Fix #170

-Remove SCG debug
Some cleanup, refs #168
Fix compile
Fix some ff2_1st_set issues

-Precache 'ui/notification_alert.wav'
-Use '/' instead of '\\'
-Default to -1 for ammo and clip in light of recent FF2_SetAmmo changes
Compile using all optional dependencies
Merge pull request #171 from 50DKP/travis-compile

Make Travis compile using all optional dependencies
1.10.3
Merge remote-tracking branch 'upstream/stable' into stable