Creativity - Creative Building in Survival

- Builds no longer overwrite whatever is in their way. Natural ground (dirt, stone, sand, leaves) is replaced and what is broken goes into the Build Chest. Anything else stops that one block until you clear it by hand.
- Water and lava are only poured once the walls around them stand.
- Server owners get settings in config/creativity.properties: what builds may replace (replaceBlocks: replaceable, terrain or all), how many builds, holograms and blueprints a player may have, how far away a build may be placed, and how large a scaled build may get.
- On dedicated servers, vanilla spawn protection now applies to builds.
- Workshops nobody is in are unloaded and come back when a member returns.
- Client and server both need 1.1.0.