fix bug about wrong order of event text
add building area
Change robot cost to a list of constants
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.
add robot button area
Merge branch 'robot-Dev'
add rough robot UI