* Event Handling:
- Changed event registration system in C++.
- Created event deregistration feature.
- Created CSL Struct to support keyboard modifiers.
- Keyboard event now receive a string value for keys, containing an entry name from Qt::Key enumerator.
- Refactored completely the eventHandling sample (samples/eventHandling)
- Created EVENT_HANDLING.md containing a quick start guide to event handling.
- Created a link in README.md poiting to EVENT_HANDLING.md

* Lua Module:
- Splitted part of __init.lua into 3 files (only ObjectWrapper-related code and global module code remains in __init.lua)
	- Types.lua: contains all lua constructors for supported types and enumerators exports
	- ConnectionHandler.lua: contains all Lua signal/slot system.
	- EventHandler.lua: contains all Lua event handling system.