Language configuration now has its own file located in /lang/, you can submit translated files to other languages to me and will include it into the plugin. (you can still find a commented version of lang inside plugin)
Added few permissions:
For /xpb on - xpboost.on
For /xpb off - xpboost.off
For /xpb gui - xpboost.gui
For /xpb info - xpboost.info
Added ability to clear boost even if player is not online
Fixed bug with XPBottles (xpb item), when having a number colors (like &5) it would add that number to the boost
Added ability to rename an item from /xpb item
You can now add more lines to the lore of the given item through /xpb item
Added few placeholders that have been requested, all of them return 0 when boost is not active instead of "blank"
xpboost_boost_time_zero
xpboost_timeleft_zero
xpboost_boost_zero
Fixed &m
Added ability to change item type in the GUI
Made changes to the API
I would suggest to regenerate ur config, to get all requred comments about new features, but its not necessarly.