permitted made false by default. This allows us to introduce configs
without affecting existing levels/activities.
json file changes for android
Dialog added for begin level. Needs to look better.
wizard for science train light - almost works. 
exchanged levels 4 and 5 in electromagnetism.
changing experiment to domain in many places.
tuning next button, scienceengine placement in level 9.
started view commands refactor.
cleaned up opening activity dialog.