Fixed lost mouse button when in relative mouse warp mode and you click on the title bar, entering a modal move/resize loop.

Testing:
* Set the SDL_HINT_MOUSE_RELATIVE_MODE_WARP hint true, run testsprite2, press Ctrl-R to enter relative mode, alt tab away from the window, then click on the title bar of the window. Didn't get the mouse button release before, and we do now.

CR: Yahn + Alfred

As part of Jorgen's code review of this function I added a call to LoadLibrary so the refcounts would be consistent between Windows and Posix. Then I forgot to include the check that the thing was actually loaded and caused it to be loaded all the time. Oops.


CR: AaronL

Added SDL_GetLoadedModule to do the equivalent of GetModuleHandle/dlload(NOLOAD)

CR: Jorgen

Try to work around Android's handling of static variables in terminated apps

Android, we want to love you, but you don't make it easy for us...

Fixed crash if render target textures are used while the device is lost

Recreate render target textures when the D3D device is being reset, and notify the application using the SDL_RENDER_TARGETS_RESET event when this happens.

Exposed the font character size and SDLTest_DrawCharacter() to make it easier to do custom debug text layout

Fixed bug where a window created fullscreen and hidden would get activated and "shown" but never actually be visible.
This is the case with the Steam In-Home Streaming client.

Fixed DualShock 4 controller config on Mac OS X.

Fix Cmake so generated SOname matches autoconf's #.