Fixed dictionary loading for preferences dialog in OSX
Update license to be GPLv2 or later.
Fix crash in LuaInterface.

Fix for loading lua values where an empty stack could be accessed and
cause a seg fault.
added openWebPage method
Fix for variables toggling their status when the user clicks away from it.
Homebrew now uses lua 5.2 by default.

Explicitly require lua 5.1.
speedup room deletion
Minor typo fix for bug#1192118.