REMOVED: DrawBillboardEx()

* Redesigned billboards - added rotation/pro functions

* updated parameters

Co-authored-by: nobytesgiven <nobytesigiven@github.com>

Co-authored-by: Lambert Wang <lambert.ww@gmail.com>

Updated to fix versioning and linking issues.
Old version would cause examples to not be linked on fresh raylib install or linked with an old library version on updated raylib install.

* Added support for additional mouse buttons

* Renamed mouse button enum

Co-authored-by: Lambert Wang <lambert.ww@gmail.com>

Co-authored-by: Jeffery Myers <JefMyers@blizzard.com>

Window shouldn't be considered ready when CloseWindow has been called.

This issue prevented enabling MSAA on several platforms

Now rlgl only depends on OpenGL and it's completely decoupled from platform layer libraries (EGL)

On PLATFORM_ANDROID, PLATFORM_RPI, PLATFORM_DRM and PLATFORM_UWP glfwGetProcAddress() is not defines, actually those platforms use egl platform windowing system.

It works compiling with MinGW

Added config flag: SUPPORT_GL_DETAILS_INFO

Increased batch limit check to compensate internal buffers alignment for lines drawing

* Log a warning if chdir failed, use agnostic CHDIR instead of chdir

* Only include libdrm directory explicitly when not cross compiling

- Found testing core_input_gamepad. The last axis was not drawn.
- GLFW_GAMEPAD_AXIS_LAST is defined to the last axis which is 5
not the total number which is 6.

- Dividing by height instead of width results in missing parts of the image.