Common depenency for most of my Bukkit plugins, includes shared code between them and version handlers for MC 1.11 and 1.12 with partial implementation for 1.10.
The included Metrics API is Copyright 2011-2013 Tyler Blair. All rights reserved.
The inlcuded AnvilGUI API is Copyright (c) 2016 Wesley Smith under the MIT License.
The included SignGUI API is made by Nisovin, unsure about permissions. If I can get in contact with him, I will verify permissions.