Added crimson and warped doors and fence gates to the default config. (You need to add these yourself if you're updating from an older version of BlockLocker.)
Added a simple API so that other plugins can add new protectables. Will be used by the Brewery plugin.
Fixed signs not autoplacing in cave air. (Thanks @WMGameLive!)
Fixed fence gates placed on top of each other opening in a strange way.
Fixed non-owners of a single chest/door being allowed to expand that chest/door into a double. (Thanks @stan60250!)