Added a real dcpu program working. Need some tweaks to handle key events, but works

Hidding registers. Used Get/Set over it

Renamed set/get methos of CPU, to setX or getX

More sane way of get CPU clock rate. Fixed screen update speed, and set to refresh at 50Hz that is every 2000 cycles
Redefined get ID, Revision and Manufacturer methods to be const. Removed static vars to store this values, now are direclty returned by value
Merge branch 'master' of https://github.com/Zardoz89/dcpu_vm