Preparing for next version... still some work left... :P

Now program is halted (OS signal call) for required amount of time every
frame, so CPU usage drops to zero, instead of using a busy wait loop.

Lighting is implemented as a raylib example now

...instead of keep polling

Actually, renamed ReadTextFile() from rlgl and make it public

Function names, code formatting...

First version of custom raylib resources file format -IN DEVELOPMENT-

- Improved ImageCopy() to support compressed formats
- Renaming file-formats header structs for consistency
- Review variables naming on ImageDither() for consistency
- Improved LoadImagePro() to make a copy of data
- Preliminary support of rRES file format on LoadImage()

- Renamed WritePNG() to SavePNG() for consistency with other file
loading functions
- Renamed WriteBitmap() to SaveBMP() for consistency with other file
loading functions
- Redesigned SaveBMP() to use stb_image_write

Feature NOT TESTED yet...

Removed: LoadTextureEx()
Added: LoadImagePro()

Signed-off-by: Saggi Mizrahi <saggi@mizrahi.cc>

Signed-off-by: Saggi Mizrahi <saggi@mizrahi.cc>

The function means to accept a const * so let's declare it.
Will allow passing const buffers in games.
Also constness is next to godliness!

Signed-off-by: Saggi Mizrahi <saggi@mizrahi.cc>

Samples count was not properly calculated on WAV loading

Start removing old rRES functions.

log2() is not available in some standard C library implementations

Replaced LUA by Lua

texture.mipmaps value needs to be updated, so, texture must be passed by
reference instead of by value