Remove trailing spaces in Android source code.

Add an entry for X11 "/" key for Brazilian keyboard. SDL2 reports the following message when we type the "/" on br-abnt2 keyboards: The key you just pressed is not recognized by SDL. \ To help get this fixed, please report this to the SDL mailing list \ <sdl@libsdl.org> X11 KeyCode 97 (89), X11 KeySym 0x2F (slash). That's because the corresponding entry in the scancodes table is marked with value SDL_SCANCODE_UNKNOWN. This commit fixes that adding the value SDL_SCANCODE_SLASH for this entry.

CMake: Slightly better fix for installation target (thanks, Anthony!). Fixes Bugzilla #2474.

Fixed typos in header file documentation comments.

Fixed SDL_GameControllerOpen() and SDL_JoystickOpen() documentation in header.

Fixed unsupported doxygen tag in header file.

Cleaned up the macro salsa in the Windows timer code. - Removed USE_GETTICKCOUNT code; it's never used now. - Reduced the number of preprocessor checks for WinRT. - Renamed timeSetPeriod() so it doesn't look like a Win32 API call.

Windows: Always set the system timer resolution to 1ms by default. An existing hint lets apps that don't need the timer resolution changed avoid this, to save battery, etc, but this fixes several problems in timing, audio callbacks not firing fast enough, etc. Fixes Bugzilla #2944.

Allocate audio buffer for application mixing in FastRAM if available. Contributed by Daniel Illgen.

Do not allocate in STRAM if TTRAM allocation is mandatory