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diff --git a/external/include/glm/gtx/matrix_decompose.inl b/external/include/glm/gtx/matrix_decompose.inl
deleted file mode 100644
index 02a5acc..0000000
--- a/external/include/glm/gtx/matrix_decompose.inl
+++ /dev/null
@@ -1,187 +0,0 @@
-/// @ref gtx_matrix_decompose
-/// @file glm/gtx/matrix_decompose.inl
-
-#include "../gtc/constants.hpp"
-#include "../gtc/epsilon.hpp"
-
-namespace glm{
-namespace detail
-{
-	/// Make a linear combination of two vectors and return the result.
-	// result = (a * ascl) + (b * bscl)
-	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER vec<3, T, Q> combine(
-		vec<3, T, Q> const& a,
-		vec<3, T, Q> const& b,
-		T ascl, T bscl)
-	{
-		return (a * ascl) + (b * bscl);
-	}
-
-	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER vec<3, T, Q> scale(vec<3, T, Q> const& v, T desiredLength)
-	{
-		return v * desiredLength / length(v);
-	}
-}//namespace detail
-
-	// Matrix decompose
-	// http://www.opensource.apple.com/source/WebCore/WebCore-514/platform/graphics/transforms/TransformationMatrix.cpp
-	// Decomposes the mode matrix to translations,rotation scale components
-
-	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER bool decompose(mat<4, 4, T, Q> const& ModelMatrix, vec<3, T, Q> & Scale, tquat<T, Q> & Orientation, vec<3, T, Q> & Translation, vec<3, T, Q> & Skew, vec<4, T, Q> & Perspective)
-	{
-		mat<4, 4, T, Q> LocalMatrix(ModelMatrix);
-
-		// Normalize the matrix.
-		if(epsilonEqual(LocalMatrix[3][3], static_cast<T>(0), epsilon<T>()))
-			return false;
-
-		for(length_t i = 0; i < 4; ++i)
-		for(length_t j = 0; j < 4; ++j)
-			LocalMatrix[i][j] /= LocalMatrix[3][3];
-
-		// perspectiveMatrix is used to solve for perspective, but it also provides
-		// an easy way to test for singularity of the upper 3x3 component.
-		mat<4, 4, T, Q> PerspectiveMatrix(LocalMatrix);
-
-		for(length_t i = 0; i < 3; i++)
-			PerspectiveMatrix[i][3] = static_cast<T>(0);
-		PerspectiveMatrix[3][3] = static_cast<T>(1);
-
-		/// TODO: Fixme!
-		if(epsilonEqual(determinant(PerspectiveMatrix), static_cast<T>(0), epsilon<T>()))
-			return false;
-
-		// First, isolate perspective.  This is the messiest.
-		if(
-			epsilonNotEqual(LocalMatrix[0][3], static_cast<T>(0), epsilon<T>()) ||
-			epsilonNotEqual(LocalMatrix[1][3], static_cast<T>(0), epsilon<T>()) ||
-			epsilonNotEqual(LocalMatrix[2][3], static_cast<T>(0), epsilon<T>()))
-		{
-			// rightHandSide is the right hand side of the equation.
-			vec<4, T, Q> RightHandSide;
-			RightHandSide[0] = LocalMatrix[0][3];
-			RightHandSide[1] = LocalMatrix[1][3];
-			RightHandSide[2] = LocalMatrix[2][3];
-			RightHandSide[3] = LocalMatrix[3][3];
-
-			// Solve the equation by inverting PerspectiveMatrix and multiplying
-			// rightHandSide by the inverse.  (This is the easiest way, not
-			// necessarily the best.)
-			mat<4, 4, T, Q> InversePerspectiveMatrix = glm::inverse(PerspectiveMatrix);//   inverse(PerspectiveMatrix, inversePerspectiveMatrix);
-			mat<4, 4, T, Q> TransposedInversePerspectiveMatrix = glm::transpose(InversePerspectiveMatrix);//   transposeMatrix4(inversePerspectiveMatrix, transposedInversePerspectiveMatrix);
-
-			Perspective = TransposedInversePerspectiveMatrix * RightHandSide;
-			//  v4MulPointByMatrix(rightHandSide, transposedInversePerspectiveMatrix, perspectivePoint);
-
-			// Clear the perspective partition
-			LocalMatrix[0][3] = LocalMatrix[1][3] = LocalMatrix[2][3] = static_cast<T>(0);
-			LocalMatrix[3][3] = static_cast<T>(1);
-		}
-		else
-		{
-			// No perspective.
-			Perspective = vec<4, T, Q>(0, 0, 0, 1);
-		}
-
-		// Next take care of translation (easy).
-		Translation = vec<3, T, Q>(LocalMatrix[3]);
-		LocalMatrix[3] = vec<4, T, Q>(0, 0, 0, LocalMatrix[3].w);
-
-		vec<3, T, Q> Row[3], Pdum3;
-
-		// Now get scale and shear.
-		for(length_t i = 0; i < 3; ++i)
-		for(length_t j = 0; j < 3; ++j)
-			Row[i][j] = LocalMatrix[i][j];
-
-		// Compute X scale factor and normalize first row.
-		Scale.x = length(Row[0]);// v3Length(Row[0]);
-
-		Row[0] = detail::scale(Row[0], static_cast<T>(1));
-
-		// Compute XY shear factor and make 2nd row orthogonal to 1st.
-		Skew.z = dot(Row[0], Row[1]);
-		Row[1] = detail::combine(Row[1], Row[0], static_cast<T>(1), -Skew.z);
-
-		// Now, compute Y scale and normalize 2nd row.
-		Scale.y = length(Row[1]);
-		Row[1] = detail::scale(Row[1], static_cast<T>(1));
-		Skew.z /= Scale.y;
-
-		// Compute XZ and YZ shears, orthogonalize 3rd row.
-		Skew.y = glm::dot(Row[0], Row[2]);
-		Row[2] = detail::combine(Row[2], Row[0], static_cast<T>(1), -Skew.y);
-		Skew.x = glm::dot(Row[1], Row[2]);
-		Row[2] = detail::combine(Row[2], Row[1], static_cast<T>(1), -Skew.x);
-
-		// Next, get Z scale and normalize 3rd row.
-		Scale.z = length(Row[2]);
-		Row[2] = detail::scale(Row[2], static_cast<T>(1));
-		Skew.y /= Scale.z;
-		Skew.x /= Scale.z;
-
-		// At this point, the matrix (in rows[]) is orthonormal.
-		// Check for a coordinate system flip.  If the determinant
-		// is -1, then negate the matrix and the scaling factors.
-		Pdum3 = cross(Row[1], Row[2]); // v3Cross(row[1], row[2], Pdum3);
-		if(dot(Row[0], Pdum3) < 0)
-		{
-			for(length_t i = 0; i < 3; i++)
-			{
-				Scale[i] *= static_cast<T>(-1);
-				Row[i] *= static_cast<T>(-1);
-			}
-		}
-
-		// Now, get the rotations out, as described in the gem.
-
-		// FIXME - Add the ability to return either quaternions (which are
-		// easier to recompose with) or Euler angles (rx, ry, rz), which
-		// are easier for authors to deal with. The latter will only be useful
-		// when we fix https://bugs.webkit.org/show_bug.cgi?id=23799, so I
-		// will leave the Euler angle code here for now.
-
-		// ret.rotateY = asin(-Row[0][2]);
-		// if (cos(ret.rotateY) != 0) {
-		//     ret.rotateX = atan2(Row[1][2], Row[2][2]);
-		//     ret.rotateZ = atan2(Row[0][1], Row[0][0]);
-		// } else {
-		//     ret.rotateX = atan2(-Row[2][0], Row[1][1]);
-		//     ret.rotateZ = 0;
-		// }
-
-		int i, j, k = 0;
-		float root, trace = Row[0].x + Row[1].y + Row[2].z;
-		if(trace > static_cast<T>(0))
-		{
-			root = sqrt(trace + static_cast<T>(1.0));
-			Orientation.w = static_cast<T>(0.5) * root;
-			root = static_cast<T>(0.5) / root;
-			Orientation.x = root * (Row[1].z - Row[2].y);
-			Orientation.y = root * (Row[2].x - Row[0].z);
-			Orientation.z = root * (Row[0].y - Row[1].x);
-		} // End if > 0
-		else
-		{
-			static int Next[3] = {1, 2, 0};
-			i = 0;
-			if(Row[1].y > Row[0].x) i = 1;
-			if(Row[2].z > Row[i][i]) i = 2;
-			j = Next[i];
-			k = Next[j];
-
-			root = sqrt(Row[i][i] - Row[j][j] - Row[k][k] + static_cast<T>(1.0));
-
-			Orientation[i] = static_cast<T>(0.5) * root;
-			root = static_cast<T>(0.5) / root;
-			Orientation[j] = root * (Row[i][j] + Row[j][i]);
-			Orientation[k] = root * (Row[i][k] + Row[k][i]);
-			Orientation.w = root * (Row[j][k] - Row[k][j]);
-		} // End if <= 0
-
-		return true;
-	}
-}//namespace glm