* Submitting rmem memory and object pool module

* changed 'restrict' to '__restrict' so it can compile for MSVC

Added `const` to parameters for `MemPool_Realloc`

* Update and rename mempool README.txt to mempool_README.md

* Update mempool_README.md

* Update mempool_README.md

* Update and rename objpool README.txt to objpool_README.md

* implementing changes

* updating header for changes.

* forgot to change _RemoveNode to __RemoveNode

* removing l

* removing l

* Updating documentation on MemPool_CleanUp function

* Updating documentation on ObjPool_CleanUp function

* changed *_CleanUp function parameter

Replaced `void*` pointer to pointer param to `void**` so it's more explicit.

* Updating header to reflect changes to the *_CleanUp functions

* A single change for the mempool and a patch for the objpool.

Object Pool Patch: if you deplete the object pool to 0 free blocks and then free back one block, the last given block will be rejected because it was exactly at the memory holding the entire pool.
Mempool change: switched memory aligning the size from the constructor to when allocating.

- Capital letters at beginning
- for loop spacing and brackets
- Functions naming for consistency
- Example following examples template
- Other tweaks

* added multi channel sound replay to raudio
added -fPIC to Makefile for Linux
added simple lighting and audio multi channel to examples Makefile

* not properly reporting audio buffer pool size...

Renamed internal function for consistency with similar functions.

Do not stop update/draw on window minimized

WARNING: SetConfigFlag() was reviewed to support int flags

Reviewed comments

With v2.5.0 out, increment API_VERSION, so binaries dynamically linked
against the released raylib aren't accidentally paired with a development
or later released raylib that may be incompatible.

Removed unused code for CAMERA_THIRD_PERSON.

Updated CAMERA_THIRD_PERSON

Allow to reconfigure stdin to read input keys, this process could lead to undesired effects. Use with care.

Disabled by default.