Wait for input events passively (sleep) instead of polling events actively every frame

- Updated dr_mp3 and implemented it
- Reviewed sampleCount vs frameCount
- Reviewed XM playing (some weird things...)

text:     IsEqualText() -WIP-
audio:  SaveWAV()
audio:  ExportWaveAsCode()
textures:  ExportImageAsCode()

Pathdefines

The comment sais it allows max 256 files, but the MAX_DIRECTORY_FILES
define actually is set to 512.

Let's have a seperate if linux block for this. Since we will need to
define MAX_FILEPATH_LENGTH for all other cases. And its more readable
like this.

On Linux systems the length of the path is defined in linux/limits.h as
PATH_MAX.
Lets use that for MAX_FILEPATH_LENGTH, which is a define that we can
find in some comments in the code that is actually never used. Instead
often we see 256 handwritten.
So lets have MAX_FILEPATH_LENGTH as a proper define, being set to
PATH_MAX on Linux and to 256 on Windows systems.

VSCode Project Updates

Vscode updates

pull

Added RaspberryPi option to ignore duplicate touchscreens (Default on)

Added multitouch example

RaspberryPi Mouse and touch overhaul

Why am I still supporting this???

Update

...disposing RenderTexture.

Remove non-Windows includes from Makefile

Loading full mp3 file works but loading for music streaming does not work, it seems total number of samples is not obtained correctly from mp3 file...

Update .gitignore

Add FileExists() function

- Ignore files in Debug.DLL from building VS2017 project.

RENAME: GetLastWriteTime() to GetFileModTime()

Added GetLastWriteTime to allow for file reloading