Graphics rendering engine. Targeting opengl core 3.3 profile supporting hardware.

##Main features:

• Window creation (glfw3) and extension loading (glxw).
• Image, mesh (iqm format), shader loading.
• Impementation of opengl shader, texture and buffer objects.
• Implementatio of render buffer and frame buffer objects.
• Homebrew GUI renderer.
• Predefined mesh geometry objects (Editor grid, GUI pane, 3d quad etc.).
• Basic logging functionality.
• Basic filesystem abstraction (at core of it is physfs).
• Basic application configuration variables (using '.json' for serialization/deserialization )
• Other utility classes.
• ...