Removed generator_params from calls to SVG processing as they're no
longer needed
Refactored to move SVG state handling code from Pipeline into
DrawingState (in preparation to moving it out of Endpoint as well)
Finished refactoring pipeline and drawing_state
Refactored Endpoint to use DrawingState
Experimental: added so.delete() in the exception handler, so that GCode
objects are deleted if something goes wrong in their creation
Merge branch 'master' of https://github.com/mattvenn/polargraphenergymonitor.git

Conflicts:
	testsite/polargraph/models/endpoint.py
	testsite/polargraph/models/pipeline.py
Changed image sizes back to versions that work
Added back in calculating x_max, y_min etc