Fix some translation strings and update translations

Handle exceptions raised when printer is disconnected 

OS X pre-lion comes with readline preinstalled in the system python.

changed console window log hiding pattern logic to avoid memory leaking and newlines separating from lines to be hidden

Italian translation

Handle g0 equal to g1.

Threaded gl rendering

Green is feedrate now

gcode viewer, for now in separate file

update translations, fix plater.py wildcards

Added licensing info to README and all source files

Translation Updates

Fixed the Options dialog so input boxes re-size but labels don't

Added right alignment for labels for easier reading/connecting label to input box.
Centered vertically the label and box so they line up clearly.