Exposing internal memory allocator/free, useful for advance users when required

Pefixing/Suffixing some data type identifier in the variables is not a convention used in raylib, just reviewed it for consistency...

Still, I kept the *Rec suffix in some functions.

Previous implementation did not consider any padding while drawing the characters on screen (despite being available on the font atlas), so, only minimum character area was drawn.

If some text effect shader was required (shadow, glow, outline...), there was no space in the drawn quad to draw that pixels effect.

This commit corrects that issue.

This is a BREAKING CHANGE!

To address the linked issue, several functions have been renamed and couterpart functions have been created to free loaded memory:
 - RENAMED: GetImageData() -> LoadImageColors()
 - RENAMED: GetImagePalette() -> LoadImagePalette()
 - RENAMED: GetWaveData() -> LoadWaveSamples()
 - ADDED: UnloadImageColors()
 - ADDED: UnloadImagePalette()
 - ADDED: UnloadWaveSamples()

Previous GetKeyPressed() method was actually returning unicode codepoints equivalent values instead of the key-code of the pressed key. So, it has been replaced by GetCharPressed(), returning unicode codepoints and GetKeyPressed() now returns key-codes.

* Changed extension for web from .bc to .a

I did this to support vcpkg expectation. When using the library from vcpkg for web you would install it using vcpkg install raylib:wasm32-emscripten but also vcpkg expects the output lib to be with .a extension instead of .bc

Doesn't make a difference for standalone builds or when raylib is used as a subdirectory dependency.

* Added headers to install targets to fix vcpkg usage

Currently vcpkg works by installing the cmake target into its packages directory. The problem is that install only copies the public header at this point so we need to add the others to the install targets.

Since I don't think the purpose of raylib is to save space compressing image, I think it could be a good idea to keep quality from 90 to 100.

Not implemented usage of this variable yet but already setup for the future... some functions require review to consider it on drawing...

Make model collision function call the mesh function.

I did this to support vcpkg expectation. When using the library from vcpkg for web you would install it using vcpkg install raylib:wasm32-emscripten but also vcpkg expects the output lib to be with .a extension instead of .bc

Doesn't make a difference for standalone builds or when raylib is used as a subdirectory dependency.

* Fixed the build for web using CMake.

I found that the build for me was failing and I added some if defined checks in the core.c file where the glfwSetWindowAttrib was used. (error: implicit declaration of function 'glfwSetWindowAttrib' is invalid in C99 [-Werror,-Wimplicit-function-declaration])

I also changed some values in the toolchain file so that it correctly uses the .bat files when on windows.

* Cleaned up the additional variables (they are not important)

* Added more improvements to cmakelists

Added the option to use the system provided Emscripten toolchain to be more uniform with other libraries.

Fixed and issue which prevented example being built from cmake and also building with html extensions properly.

* Fixed ENUM to STRING because of a missed warning

* Add options to set line width and aliasing to rlGL layer.

* Don't do line smoothing in OpenGLES

WARNING: Some CMake files not changed
WARNING: glfw_native.h contains custom changes

Let the advance users manage it as they want...

WARNING: Several functions removed, replaced by SetWindowState() / ClearWindowState() equivalents, only for advance users.
ADDED: ClearWindowState() to reset window state
REMOVED: HideWindow() / UnhideWindow()
REMOVED: DecorateWindow() / UndecorateWindow()

Some flags not working properly yet...

The improvement in performance is considerable!

There were some problems about frameCount vs sampleCount that could cause some breaks.

raylib audio structs stores sampleCount = frameCount*channels.

Most libraries return framesCount instead of sampleCount.

stb_vorbis seems to refer to framesCount as samples.

All required functions have been reviewed.

WARNING: OBJ loading is broken at this point...