Snes9x 1.58

This is a small, but important, bugfix release. Movie support, which was broken in 1.56 has been fixed. The GTK+ port will be able to save config files again while using non-latin languages. Aside from that, there have been some cleanups and a bit of UI refinement. The only emulation change is an adjustment to a timing hack.

Changes:

Snes9x 1.58
- Move the LICENSE file to the base directory and use a stub
  in all the source files referring to it. 
- Adjust Chou Aniki timing hack.
- Use 1-based numbering when displaying pressed keys.
- Hide controller port if disabled when displaying keys.
- Fix movie playback.

 libretro:
- Fix interlaced modes when overscan crop is enabled.
- Allow overriding -flto. (orbea)

 GTK+:
- Use shared snes_ntsc implementation.
- Remove extra LGPL licensing to avoid confusion.
- Don't translate config file entries. Fixes breakage on
  non-C languages.
- Fix issue where config file doesn't contain all configurable
  entries.
- Remove config options for Netplay, Joystick, and JMA. SDL 2.0
  is now mandatory.
- Updated gettext and removed intltool. update-po should now catch
  all translatable strings.
- If available, reduce input lag option will now use fences instead
  of glFinish to prevent hogging the CPU.
- Onscreen text can be variable width and will show up in some more
  cases now.

 Win32:
- Add audio device selection (XAudio2 only)