ImageDraw() is actually used in multiple functions and it aslo depends on several functions...

* Fix gamepad axis count

* Fix Xbox axis drawing

* Ignore low axis values

* Revert "Fix gamepad axis count"

This reverts commit f08ae4bf

* Fix GamepadAxis API

* Fix conflict with master

* Revert Gamepad MAX definitions

* Revert MAX_GAMEPAD_AXIS update

Removed ImageAlphaMask() dependency on [text] LoadBMFont()

Those functions could be very useful for custom triangle data drawing, using internal batch system.

Some comments added

Most warning were related to types conversion (casting required) and unsigned/signed types comparisons.

Added preprocessor directives (_CRT_SECURE_NO_DEPRECATE; _CRT_NONSTDC_NO_DEPRECATE) to avoid warnings about unsafe functions, those functions are safe while used properly and recommended alternatives are MS only.

Some external libraries still generate warnings.

Created RenderBatch type and related functions to allow rlgl users creating custom and separate render batches and not only rely on one internal render batch.

This feature has not been exposed on raylib yet because it implies some breaking changes. Right now a custom RenderBatch is just used internally in rlgl.

There are multiple #define values around raylib, usually not exposed for redefinition, just reviewed all of them to allow users redefining them on compile time if required.

Also, multiple #define have been renamed and commented.

Mostly code formatting tweaks

* First draft of UWP rework.

* Read desc

- Moved UWP specific functions to uwp_events.h
- Removed BaseApp.
- Implemented example UWP lifecycle.

* Added GIF recording and screenshot support.

* Character inputs and filesystem stuff

* Fix game closing on Xbox when B is pressed.

* Fix the gamepad binding hack

* Add as many keys as I believe are possible.

* Implemented mouse locking of a sort.

* Remove rogue todo, the rest are for a game dev using this example.

* Implemented touch how I "think" it should work. I cant test this.

* Review.

Optimizations of allocators.
Renamed 'Stack' to 'Arena'.
Replaced certain define constants with an anonymous enum.
Refactored MemPool to no longer require active or deferred defragging.

Make easings.h use powf and sqrtf instead of pow and sqrt.

* Make raymath naming and functions more consistent

* Minor fixes

* Fix examples

* Fix Physac

* New naming rules

* Apply naming to Quaternion functions

* Apply to models.c

* Remove *MulitplyValue / *DivideValue

Actually this function is useless and potentially dangerous, internally, a shallow copy of data was done. Same could be accomplished accesing image.data directly.

To unify with DrawText*() equivalent functions

Now it's blazing fast. It modifies image.data directly.

Previous version could take up to 3-4 seconds to draw a line... now it takes some nanoseconds...

As noted in #539, the symlink check was to support compiling raylib on
VirtualBox vboxfs as no symlinks are supported there.

With me using Linux as daily driver outside VirtualBox now, this 'feature'
is most likely unused by anyone, but still annoys other users (#791).
Just revert it and be done with it. If there are really others building
raylib on vboxfs or a similarly crippled file system under Linux, they
should now step forward when their build breaks.

This reverts commit b8ca51fd01.

- Removed generate_android_toolchain, since version r21 AndroidNDK it's the toolchain
 - Removed external lib native_app_glue, provided by AndroidNDK

Actually, project just adds 50MB of ANGLE libraries not related to raylib.
Also reviewed UWP project to consume ANGLE from the NuGet package.

* added log warning for unsupported file extension for music stream

* updated error log message for music stream when file format isn't supported