Added: data to CharInfo struct
Added: LoadFontData()
Added: GenImageFontAtlas()
Removed: LoadFontEx()
Removed: LoadTTF() [internal]
Some code tweaks

- Preparing MP3 files support
- Jumped version to raylib 2.0-dev (too many breaking changes...)

- Some examples tweaks
- Reviewed ImageFormat()
- Use float for text fontSize

That way, a user needs only to touch a single file to configure what
features raylib is built with.
Include guards are left out intentionally, because config.h should only
be included in source files, not headers.

Later on, config.h can also define the raylib version (#461).

Fixes UB in #489, found by UBSan.

Width specifier doesn't include NUL terminator.
Fixes #487 found by AddressSanitizer.

Supported UTF8 range equivalent to [128..255] (80h..FFh)
Exposed and renamed text function GetGlyphIndex()
Renamed spriteFont parameter name to simply font
Small security check on transmission mission ending screen

Let the user choose if using rres external library

Moved function DrawRectangleT() from text module to shapes
Added some comments

Usefult to draw rectangles using default font texture

...to avoid possible conflicting symbols

LoadSpriteFontTTF() --> LoadSpriteFontEx()

enum LogType could require some revision...

Replaced old GetExtension() function
Make IsFileExtension() public to the API

It seems Sleep() behaves weird on my computer, disabled by default
returning to the busy wait loop... also re-implemented DrawFPS() to
avoid frame blitting...

Working in modules configuration flags...

Now it uses CharInfo data, this way, it's better aligned with the future
RRES file format data layout for sprite font characters.

Now program is halted (OS signal call) for required amount of time every
frame, so CPU usage drops to zero, instead of using a busy wait loop.

- Renamed WritePNG() to SavePNG() for consistency with other file
loading functions
- Renamed WriteBitmap() to SaveBMP() for consistency with other file
loading functions
- Redesigned SaveBMP() to use stb_image_write

Mask was wrongly applied to 8-bit font image, it generated dark borders
on the font. Grayscale image has to be considered as the alpha mask for
a completely white image to use it correctly.

Still not working correctly, font offsets are not considered
correctly...

Support by default unordered charsets

Still requires some testing...

LoadSpriteFontTTF() - TTF font loading with custom parameters