fix emergency stop status message, was not updated in touchapp header
add temperature stabilization interval to M109/M190 implementation
minor layout padding/margin modifications to better utilize full screen area
move shutdown button more prominently next to emergency stop button in header
observe PSU status (on/off) throughout all layers (RepRapHost, Rails, touchapp)
add back-to-queue button to pre-print check message
add minus sign to gcode keyboard
update angular-rails gem
allow deep links in backend