Mild refactoring of Mesh (Mesh components in Mesh.cs, not MeshPArser.cs). Added MeshLoader.loadMeshFromFile method that invokes MeshParser

	modified:   src/file/MeshLoader/Mesh.cs
	modified:   src/file/MeshLoader/MeshLoader.cs
	modified:   src/file/MeshLoader/MeshParser.cs
	modified:   src/file/MeshLoader/Test.cs
Changing public interfaces
	modified:   src/file/MeshLoader/Mesh.cs
	modified:   src/file/MeshLoader/MeshLoader.cs
	modified:   src/file/MeshLoader/MeshParser.cs