Allow to choose which modules are compiled with raylib, if some modules are excluded from compilation, required functionality is not available but smaller builds are possible.
raylib was using `stb_perlin.h` library to generate perlin noise, it seems that recently this library has been flagged as it could be infringing some algorythm patent. For security, it has been removed from raylib.
raylib modules have been slightly renamed to add some identity and note that they are independent modules that can be used as standalone separate parts of raylib if required.
The renamed modules are:
- `core` -> `rcore`
- `shapes` -> `rshapes`
- `textures` -> `rtextures`
- `text` -> `rtext`
- `models` -> `rmodels`
- `camera` -> `rcamera`
- `gestures` -> `rgestures`
- `core` -> `rcore`
All the build systems has been adapted to this change.
Ray