Raymath dllexport fix

- Using raylib.h as reference, added define checks for BUILD_LIBTYPE_SHARED and USE_LIBTYPE_SHARED.

- Added check for dllexport to compile if _WIN32 defined.
- If not defined then use the original RMDEF.

- Added __declspec(dllexport) to RMDEF in raymath.h. This allows them to be accessed when importing from raylib.dll.

Added Sublime Text 3 project template

- Added Sublime Text project file.
- Added Sublime Text build system.

Shapes: Simplifies CheckCollisionRecs

Games: Fixes bugs in Snake

By comparing the edges of the rectangles relative to each other we can
determine if they intersect or not.

CheckCollisionRecs() returns true on edge-collision what means that the
snake eats the fruit when colliding with it but also when sliding by one
unit above or below the fruit.

If the initial fruit position collides with the snake's body a new
position for the fruit is generated but without adding the grid offset.

Update mini_al to 0.8.5.

This should improve the Raspberry Pi experience.

[Feature Request] 9-patch drawing function

See raylib/examples/textures/textures_image_9patch.c for how to use `DrawTextureNPatch` function.

Corrected issue with sound playing (pop sound at the end)

Just reviewing for a possible adaptation of AnimatedModel to default raylib Model...

Fix compiler warnings

Added support form vertical and horizontal 3-patches.
Corrected the distortion caused when destRec size is smaller than 4x4. Now even 1x10 or 0x0 sizes are drawn correctly.

Added support form vertical and horizontal 3-patches.
Corrected the distortion caused when destRec size is smaller than 4x4. Now even 1x10 or 0x0 sizes are drawn correctly.

[physac] Fix Physac examples to be run without creating new thread

Added DrawNinePatch() function implementation.

Added NinePatch struc definition and function prototype.

fix problem when compiling with MSVC 2017, error C2177

The GLFW tree distributed with raylib has two modifications:

- GLFW_PKG_{DEPS,LIBS} are exported to PARENT_SCOPE, so we can use them
  in our pkg-config file
- An intermediary glfw_objlib target is added, so we can reexport GLFW
  symbols from libraylib.a

rglfw can fix the second point, but for Wayland usage, we would have to
replicate protocol generation, so we just leverage GLFW's existing
support instead.

To make maintenance easier, I have submitted a pull request for
including these modifications to upstream GLFW.
And to make that one easier, this patch dog-foods the modifications,
so raylib users can help find regressions. :-)

glfw/glfw#1307

[games] Prevent GLFW changing working dir to 'Resources'

So user code can use add_subdirectory to build it (similar to what we do
with GLFW or what the projects/CMake/CMakeLists.txt can do).

The CMakeLists.txt checks for an installed raylib and downloads and
installs one if none is found. Afterwards, it builds core_basic_window.c

CMake: Major cleanup to support find_package(raylib)

With the recent CMake cleanup, getting raylib's dependencies for use
when building rlgl_standalone is quite straight forward, so lets enable
it again.

Fixes #508, just properly this time. :)

Homebrew doesn't ship 32-bit libraries anymore, so using both
-DUSE_EXTERNAL_GLFW and -DMACOS_FATLIB with a Homebrew GLFW would fail.
With -DUSE_EXTERNAL_GLFW=OFF, this is not a problem, but I think keeping
it off by default makes more sense. If someone wants universal
libraries, they can just toggle it.

PLATFORM_WEB is not the only platform that doesn't define
GLFW_TRANSPARENT_FRAMEBUFFER, it's also recent enough that it's not
included in the most recent GLFW 3.2.1 release, so this error can creep
up when using USE_EXTERNAL_GLFW.