implemented interiors; workers do now enter an empty map when working (rightclick to follow them);
also enter buildings for sleeping, eating and public thug harressment
only generate interiors when described in towndata, so the park doesn't get em;
added a fallback for old code acessing actor.map; got to remove the setter though;
first draft of the lowerClassHouseInterior gfx;
fixed some spelling, logic and styling issues with the first tutorial message;
Merge branch 'master' into gh-pages