Fixed height bug in DrawTextRecEx()

It was not working on Windows 10

Remove compiled libraylib.a

Added some comments to loader function...

Fix config.h flags

raudio AudioBuffer internal struct collides on macOS with CoreAudio same name struct. In this case struct has been renamed because is internal to raudio... but probably all system should be redesigned.

LoadBMFont filepath fix

Custom implementation that returns -1 if it fails (no negative values supported)

...while using a RenderTexture combined with 3d mode

REDESIGNED: rlLoadRenderTexture()
ADDED: rlRenderTextureAttach()
ADDED: rlRenderTextureComplete()

Probably uncomplete, not tested yet...

Added DrawTextRecEx()

GGJ2019 game

Fix clang++ compilation errors

Fix font cannot be narrowed to type 'int'

Getting the following strict error....

```
src/text.c:117:105: error: constant expression evaluates to 2398692640 which
      cannot be narrowed to type 'int' [-Wc++11-narrowing]
...0x00000000, 0x00000000, 0x00200020, 0x0001b000, 0x00000000, 0x00000000, 0x8ef92520, 0x00020a00...
                                                                             ^~~~~~~~~~
```

Switching it to an unsigned int fixes it.

clang was complaining about the type conversions. For example...
```
node_modules/raylib-src/src/core.c:1888:15: error: cannot initialize a variable of type 'char *' with an
      rvalue of type 'void *'
        char *cmd = calloc(strlen(url) + 10, sizeof(char));
              ^     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
```

Remove libraylib.a

They could be useful for some people...