Merge pull request #77 from marcusmoller/master

Added PS1 (32-bit only) and N64 emulator to GNU/Linux
Removes ability to set control scheme (#72)
Adds custom consoles (#70)
Removes Mac-specific values in consoles.txt
Adds user defined emulators. Fixes #71
Expands ~ in emulator locations
Added GNU/Linux example in emulators.txt and commented out Windows example.