Fixed MINTEMP error message to start with Error:
add M206 Snnn to change acceleration on the fly as slic3r does
Merge pull request #180 from wolfmanjm/feature/m206

add M206 Snnn to change acceleration on the fly as slic3r does
add break to M 204
Merge pull request #179 from mitchese/fix/mintemp-error

Fixed MINTEMP error message to start with Error:
fixed PlayLed functionality as per arthur's recomendation
Merge remote-tracking branch 'upstream/edge' into vikilcd
add
 		virtual void on_refresh(){};
		virtual void on_main_loop(){};
to lcd base and also access to the Panel instance.