added lua function for GetTimeSinceStart

Allows checking time within a single update. This can be used to halt
processes which would otherwise cause lag.
Remove unintuitive loop condition from ActorScroller
Remove unused variable from ActorScroller
Changed GameState::UnjoinPlayer to actually follow its own comment and unjoin the player from STATSMAN first, instead of unjoining from PROFILEMAN, then STATSMAN, then PROFILEMAN again.  Changed ProfileManager::UnloadProfile to skip unloading if the profile wasn't actually loaded in the first place.
Update UPX to 3.91
Switching to double style shouldn't join the other player.  It isn't necessary for input, the engine ScreenSelectMusic doesn't do it, and it forces a theme with custom SSM and style changing to unjoin the player that wasn't really joined.
Move PCRE to separate project (2011)
Move PNG to separate project (2011)
HNS_Missed

Added an HNS type to handle holds which are never initialized due to
missed taps. This fixes a long standing issue with
iCurPossibleDancePoints and allows themes to decide how to handled this
case.
Move GLEW to separate project (2011)

Note: glext.h was removed due to it not being used.
Move LUA to separate project (2011)
Merge pull request #70 from sigatrev/RageTimer

added lua function for GetTimeSinceStart
Merge pull request #94 from sigatrev/MissedHold

HNS_Missed
Merge pull request #91 from root670/master

Update UPX to 3.91
Merge pull request #95 from wolfman2000/wolf-libraries

Separate out VS2012 projects appropriately.
Save/LoadProfiles

ScreenProfileLoad and ScreenProfileSave do nothing except use their own
lua methods to run GameState functions. Those functions might as well be
available as GameState methods.
luadocs

added lua documentation
StartTransitioningScreen

Exposes the StartTransitioningScreen function to lua. Great utility for
custom screens.
Merge pull request #111 from sigatrev/StartTransitioningScreen

StartTransitioningScreen
Merge pull request #110 from sigatrev/Save/LoadProfile

Expose Save/load profile to Lua. This deprecates ScreenProfile{Load,Save} completely, but those are going to be left in until post-5.0