changes:
[OpenGL] added GLEW source files inside the project
[PngLoader] inverted image on read (for OpenGL)
[Text] moved position information outside of vertex buffer and into the world matrix
[Text] added scaling of text
[Text] added Google NotoSans fonts to resources
[KeyboardInput] corrected initialization
[Matrix] added Translation variant that takes a Vector3 as parameter
[Profiler] added getter for sorted profiling data (to be used in apps)
[OakVR] updated interface and made a lot of methods const; added UnregisterMesh/RemoveMesh
fixed slashes in many include paths
renamed Updateable into Updatable
refactored some code
misc changes
added screencoords  to window client coords transformation in interface
refactored some code
changes:
 added window position change support
 added text rotation support
 early crash in case the resource folders cannot be loaded
 changed Updatable::Update to return bool
 final version now also prints error messages