Spawners <3

Changed how the flags work, now have a spawner. Renamed some things,
Geoforts_Flag is now entity_flag. Fancy rendering and stuff. Also added
code to stop people from interacting with other people's blocks, so made
a new entity_block, which has a team networked var. Also, the flag will
always be a frozen entity, can be changed easily. Have a look if you
want.