Remove unused uCommands from uGearsHandlersMess

Fix lastGameType not being updated if game type was demo or save (fixes a crash) Previously, if you first played a normal game, then a demo, the “play again” button would appear, but clicking it would only crash HW. This fix will remove this button after a demo or save, because the frontend doesn't know how to restart demos or saves yet.

Fix desyncs when forcing rope re-selection after missing a shot or hitting bounce world edge Also re-introduce rope-reselection when touching ground

Fix desync when dropping weapon from parachute or jetpack

Backed out changeset 28210d2a9a36 (fixes bug #553) This fixes a desync when you take fall damage while roping and having a secondary ammo selected.

initialise previousGameState to something valid and not gsSuspend

Add Lua problems to the troubleshooting section of INSTALL.md

travis: Install qt4 with a brew tap

Don't send taunt message for automatically happening taunt animation

Remove newlines at end of Gravity mission panel