WARNING: BREAKING: REDESIGNED: rlgl module

- Many functions renamed to follow rl*() convention
- Some internal functions exposed in the API
- Some functionality moved to other modules
- Reorganized all functions by categories
- Make sure it keeps working with OpenGL 1.1 and 2.1

src/raylib.h

@@ -1244,6 +1244,7 @@ RLAPI void UpdateTexture(Texture2D texture, const void *pixels);
 RLAPI void UpdateTextureRec(Texture2D texture, Rectangle rec, const void *pixels);                       // Update GPU texture rectangle with new data
 RLAPI Image GetTextureData(Texture2D texture);                                                           // Get pixel data from GPU texture and return an Image
 RLAPI Image GetScreenData(void);                                                                         // Get pixel data from screen buffer and return an Image (screenshot)
+RLAPI void SetShapesTexture(Texture2D texture, Rectangle source);                                        // Define default texture used to draw shapes
 
 // Texture configuration functions
 RLAPI void GenTextureMipmaps(Texture2D *texture);                                                        // Generate GPU mipmaps for a texture