plater.py i18n

This reverts commit bfc30d6b.

Moved around and added back temperature gauges for hotend and bed. Hide auto-monitoring temp updates from text-box.

Update pot files and German translation

Reformat for pep8 conformance

rework german translation

Allow resize "Edit Settings" dialog and change slicer exception text

Resizing the options dialog is now possible, this will allow you to check the paths for slicecommand and sliceoptscommand 

Conflicts:
	pronterface.py

Make bgcolor configurable

Merge fixes added to master into experimental

Refactoring plater. 

refactor - shape move and rotate into functions for nonGL canvas, keyboard manipulation. Added -nogl option to force nongl canvas.

refactor - shape moving and rotating into funcions. Keyboard mainipulation is there, except it doesnt work as I have no idea where keypress events go (definitely not canvas)

load_scad line parsing rewrite