Open KF v0.3.0

Full Changelog: v0.2.1...v0.3.0

Map fixes

• Terrain: pale, blocky patches are gone from KF-Manor's pond beds and 13 other outdoor maps.
• KF-Manor water: the lake now reflects its surroundings the way it does in KF.
• Stepping over low objects: you can walk over low objects like the brick piles at the start of KF-Offices instead of getting stuck.
• Moving textures: scrolling and wobbling map textures now move, so
  KF-Offices' rain falls and clouds, fog and signs on other maps animate.

Map rotation

when a match ends, the game moves to the next map in the rotation without closing, in single player and multiplayer.

• Multiplayer map changes: players stay connected through the change, and the lobby reopens on the new map with everyone set to not ready.
• Map voting: KF's end-of-match map vote, with KF's rules; it's off
  by default and turned on with --map-vote or the launcher switch.
• Launcher rotation tab: a new Rotation tab lets you choose and reorder the maps, and the game remembers its place in the list between sessions.

Small stuff

• Loading screen: KF's own loading screen shows while a map loads, with the map preview, ". . . LOADING" and a gameplay hint.