Steven updated tower and castle art
Added ImageList and ImageSelectBox

- For color selection...though that may be better simply as an ImageButton that toggles...oops
Yep, just an image looks much better than the ImageSelectBox
Got a nice mock up of the new setup screen in SPSetupScreen
Restructured GameServer logic - now uses RegisteredPlayer instead of Spectator internally
Color/ready updates seem to work
Got all the (MP) client-facing stuff going for all these configs, now just need to implement it in the server/controller and SP client
Ported UI things over to SP; implemented spawn, first move for both SP and MP :)
Timing rules! Base timer, action bonus and unit bonus can now be set!
Added map thumbs
Added MP lobby chat
Fixed a bug in MP where random spawns was not synced
Unit rebalancing

- Nerf bazooka to 20hp (from 25)
- Buff tank to x1.5 vs buildings, mech (from x1)
- Artillery AD to 20 (from 25), bonus x1.5 vs buildings, mech (from x1), range 6 (from 5), vision 3 (from 2)
- Light mech attack speed 4 (from 3)
- Castle armor 2 (from 1), attack speed 2 (from 1)
- Tower attack speed 2 (from 1)
Implemented diminishing returns for towers
Added increasing-returns
Bugfixes: Spawn bug, MPGameSetup guest --> host transition, toggle buttons on options screen
Small tweaks - returned abstract screen to scaling, game timer is now ceil instead of floor, starship altered somewhat
Nerfed artillery a bit, removed extra large center section from starship
LDPI, MDPI no longer selectable when Linear filter is enabled
Added turn indicator, removed income label in build display on info panel