Added open file in menu.
Improved open file functions.
Added reload action in file menu.
Added seperator in menu.
Fixed xml formatting.
Fixed open file to use existing methods.
Fixed reload to use existing methods.
Fixed whitespace.
Create high precision timer class and use it for CPU emulation.
Fix return value of reloadFile.
Merge pull request #22 from Ventero/worker

Moved CPU emulation to high precision worker thread.