dyncom: Move SEL over

CFG: Implemented the GetConfigInfoBlk2 function.

dyncom: Move over SASX/SSAX/SADD16/SSUB16

Moved most of the shared CFG code there, implemented a few CFG:I functions

That's the language id block, we're using LANGUAGE_EN for now. This block allows some games to boot further

It is now kept in memory as per 3dbrew, all updates happen on memory, then they can be saved using UpdateConfigNANDSavegame.

Seems to allow some games to boot further, thanks @Normmatt for sharing this information

Added a "config" file to the CFG process service (CFG:U), and added a few default blocks to it.

Implemented GetSystemModel and GetModelNintendo2DS

License change

Added CreateFile to the FS_USER service

Tested with hwtests.

armemu: Implement SADD8/SSUB8

Thread: Wait current thread on svc_SleepThread

Travis: Enable caching of dependencies

- Removed unused VBLANK sleep mode
- Added error log for bad context switch
- Renamed VerifyWait to CheckWaitType to be more clear

Kernel: Implement support for current thread pseudo-handle

dyncom: Implement UMAAL

armemu: Fix SSAT16.

armemu: Should be using labs for USAD8/USADA8