Starward Rogue Update 1.011-1012: 4 New Enemies, Performance Fixes

Another two updates!  These one have four enemies, three of which are community-created.  This also fixes the performance-eating aspects of our own recently-added Demesne enemy.  And there was a performance regression in 1.010 in general that is now fixed.  Sorry about all the hitching that was causing — it was worst on linux, but happening on…