lots of bugfixes

- bugfix Engine.startThieves call changed to $SM call
- bugfix $SM.remove not deleting state
- bugfix workaround for empty string when creating states
     For some reason splitting "state.sub.sub2["sub3"]" will result in
     empty strings whereas "state.sub.sub2[\'sub3\']" didn't. Maybe a
     javascript regex quirk?

     Had to add a loop to remove '' from the split string array.
- modified collectIncome so that only one update event fires for the 
  whole function, no event if no income was added.
- modified updateBuildButtons so that buttons would show up if the
  building had already been built.
     changed check to be wood != undefined

     Also changed room to display store values of 0 instead of removing 
     the row. It was distracting to have the values shift up and down 
     when tightly managing a resource. If you haven't seen a resource 
     yet, it still doesn't show up.
turned off debug