import event title,text and button to event window.
modify CSS for event system.
add message pushing.
jump between scenes works.
fix bug about wrong order of event text
add building area
Merge branch 'Model-dev'
Add init sequence for Outside (explore)
Add max tier level
Robot list is a whole list now

Add test command for add robot:
add attacker/defenser/gather/healer
The commands will add one robot to robot list.