Add sample for drawing an image and basic interface
Throw if file class is used too early on android
Add class for compiling shaders
Create shader_program class to link vertex and fragment shader
Create access to attributes
Throw instead of creating invalid objects
Create access for uniforms
Add shader for rendering images
Throw for invalid images
Fix android
Add class representing a 4x4 matrix
Fix basic drawing sample
Assign attributes to shader
Rename graphics to renderer
Make it possible to create file objects from the main function
Add rectangle class
Add class for loading and binding textures
fixup! Add rectangle class
Render texture
Draw texture