Changelog:
* Allow configuring most important options from the menu (Amiga models etc)
* Fix Nunchuk/Classic controller conflict
* Add virtual keyboard to set keyboard-to-controller-button bindings
* Store configuration when modified in the menu and allow uaerc.user to override the configuration
* Saving and restoring states now work
* Harddisk support is now built in, but works so-so (and has no menu support)
* Hundreds of small fixes here and there