ZeroK: Matchmaker Maps Rotation

From ZeroK: link to original post

It's time for a Matchmaker map pool rotation to introduce new maps (and give some old ones some love too).

Removed from 1v1 pool:

Shimmershore v1.0
Zed 2.3
Obsidian_1.5
Comet Catcher Redux v3.1

Added to 1v1 pool:

Something old: Into Battle v4
Something new: Thornford 2
Something borrowed: EvoRTS-New_Iammas-v05
Something blue: Aurelian v1.0

The same changes apply to the teams MM pool with one exception - Comet Catcher remains a MM teams map.

All of these changes are now in effect except for Into Battle, which will be added to the map pool after the next stable fixes its 1v1 startboxes.