Swap endian of RTC data when necessary
UTCOffset and PreferSGB settings added.

Both are temporary - PreferSGB will be replaced with a multiple-choice setting (GBC, SGB, GB) and UTCOffset needs to go in increments of .25 ranging from -12 to +14.
Add emulation settings to main menu
Rename settings
actually add button to menu
Fix emulation settings category.

TODO: move emulation settings from game menu to main menu
Move emulation menu from game settings to main settings
Add SGB border setting to menu and fix pitch

Border is only loaded when emulator is in SGB mode.
TODO: custom borders (from PNG hopefully)
Use VBA's gbEmulatorType to select GB/SGB/GBC instead of a custom variable
Attempt to avoid incorrect byte order detection