This function was renamed for consistency in raylib 3.0, just unified all examples to use TextFormat() instead of FormatText()

They are not automatically unloaded when unloading the model!

Redesigns, deletes and renames

Also noted authors propertly on contributed examples

- Renamed Begin3dMode() --> BeginMode3D()
- Renamed Begin2dMode() --> BeginMode2D()
- Renamed End3dMode() --> EndMode3D()
- Renamed End2dMode() --> EndMode2D()

Could correct possible issues on OpenGL 1.1