Levels are now saved in individual, human readable/editable .yml files as opposed to one big .ext file.
Toll signs can now be restored if accidentally deleted, and moved. If a toll sign with a particular name is deleted, it will be restored with all of the same attributes if a new toll sign with the same name is created.
Zombie pigmen outside of ZArena no longer move extra fast.
Potentially unstable due to the vast number of changes in 1.7.2