Update expansionlocations again, add dump data, unit.can_be_attacked

[tweakimp]

• expansion_locations now works correct for all 50+ maps in @BurnySc2 s tests
• in client.py you now find dump_data which lets you write all the game data into a file for further use
• Unit object now has can_be_attacked property which checks if you can actually attack an opponent unit (unit is not cloaked or cloaked and revealed)