LTreeViewItem: aesthetics
LTreeViewItem: impleted getTooltip callback
implemented unreg method accessible from any LComponent to unregister a callback
LLable: implemented tooltip callbacks
OSX: set back to 5.1 and added lua include path
fixed some warnings
LuceO: fixed componentboundscontainer not returning anything
LookAndFeel: implemented a bit further
added forgotten header
OSX: set compatibility version
luce.h: include c++11 thread
MainThread: accept a frequency at which control can be run
API: modified start_manual to accept a frequency at which control function will be executed
call is now :start_manual(app, freq, func)

+ fixed a potential leak/bug with table not fully pop'ed
API: added a sleep method, taking ms
LApplication:

- updated start_manual to new API

- improved LLC to push control routine also
removed debug messages