fix typo in do_pause() log output

Merging awesomeness

Getting the print queue api working with the printer, adding a job progress panel to inspector and adding job_finished and job_started events.

Throttling the DOM writes of pronserve inspector and stopping dom writes entirely when the window looses focus.

Adding a sleep to the pronserve startup. Seems to be fixing an intermittent bug where the printer wouldn't respond to temperature requests

Refactoring Pronsole to wrap print in a self.log method so that it can be reused and overriden by a web interface or any other non-conosole interface

Recovery after pause

implemented the @pause gcode host command (and a small framework for host commands)