fixed undisplay image on fbview start-up
fixed constness of FbGetColor
added tools makefiles
added Compatibility.h
added glsl shaders
added struct ShaderProgram
added os_unix.c
added visual studio files
added apply_pixel_filter
added integrate_samples
added TlrGetTile
added Rectangle to Sampler
cleaned render_scene
added struct ImageCard
added draw_image
added Callback.h
fixed diplaying alpha
added progress callbacks
added struct WorkReport
added struct FrameReport