Double Action: Boogaloo v1.2.1.2

Hello fellow Double-Actionists!

Just a tiny update concerning mostly the non-Windows users.

• Linux users no longer crash when entering observer mode (already released on 2016-06-18)

• The Mac build is now up-to-date and thus compatible with the servers again (thanks rezidue)

Btw, if someone knows how to build the Mac port on Linux, please share, as that would make updating the Mac build a loooot easier :)