Added Meshes and Animations (And many more)

Added NzTexture::IsMipmappingSupported
Color::(FromTo)HSV now takes hue and saturation in degrees
Fixed Context::EnsureContext
Fixed COW thread-safety (String, Image, Matrix4)
Fixed Quatenion<T>::operator*(const Vector3<T>&)
Fixed ResourceLoader
Fixed String::Resize with a size of 0
Fixed Texture mipmapping crash
Fixed per-class thread-safety
IndexBuffer and VertexBuffer are now resources
It is now possible to use more than 8 texcoords per shader
Moved all enumerations into separate files (Core/Enums.hpp,
Utility/Enums.hpp, ..)
Removed NzContextParameters::defaultWindow
VertexDeclaration has been rewritten (New interface/COW)

src/Nazara/Utility/SubMesh.cpp

@@ -0,0 +1,68 @@
+// Copyright (C) 2012 Jérôme Leclercq
+// This file is part of the "Nazara Engine".
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Utility/SubMesh.hpp>
+#include <Nazara/Core/Error.hpp>
+#include <Nazara/Core/String.hpp>
+#include <Nazara/Utility/Config.hpp>
+#include <Nazara/Utility/Mesh.hpp>
+#include <stdexcept>
+#include <Nazara/Utility/Debug.hpp>
+
+NzSubMesh::NzSubMesh(const NzMesh* parent) :
+NzResource(false), // Un SubMesh n'est pas persistant par défaut
+m_parent(parent)
+{
+	#if NAZARA_DEBUG
+	if (!m_parent)
+	{
+		NazaraError("Parent mesh is null");
+		throw std::invalid_argument("Parent mesh must be valid");
+	}
+	#endif
+}
+
+NzSubMesh::~NzSubMesh() = default;
+
+void NzSubMesh::Animate(unsigned int frameA, unsigned int frameB, float interpolation)
+{
+	#if NAZARA_UTILITY_SAFE
+	if (!m_parent->HasAnimation())
+	{
+		NazaraError("SubMesh is not animated");
+		return;
+	}
+
+	unsigned int frameCount = m_parent->GetFrameCount();
+	if (frameA >= frameCount)
+	{
+		NazaraError("Frame A is out of range (" + NzString::Number(frameA) + " >= " + NzString::Number(frameCount) + ')');
+		return;
+	}
+
+	if (frameB >= frameCount)
+	{
+		NazaraError("Frame B is out of range (" + NzString::Number(frameB) + " >= " + NzString::Number(frameCount) + ')');
+		return;
+	}
+
+	if (interpolation < 0.f || interpolation > 1.f)
+	{
+		NazaraError("Interpolation must be in range [0..1] (Got " + NzString::Number(interpolation) + ')');
+		return;
+	}
+	#endif
+
+	AnimateImpl(frameA, frameB, interpolation);
+}
+
+const NzMesh* NzSubMesh::GetParent() const
+{
+	return m_parent;
+}
+
+unsigned int NzSubMesh::GetVertexCount() const
+{
+	return GetVertexBuffer()->GetVertexCount();
+}