This update is mostly code improvements.

The HeadsPlus menu in-game is now opened using the API rather than a command. This means the headsplus.heads permission no longer has any bearing in a TNTRun arena. The tntrun.heads permission controls access to the menu in the TNTRun arena, while the headplus.heads permission controls access to the /heads command outside of TNTRun.

Change Log:

• remove special.FancyBlockBreak from the default config.yml
• use HeadsPlus API to open the heads menu in a TNTRun arena
  
• tntrun.heads replaces headsplus.heads as perm controlling the heads option in-game
• remove static modifier from postition field in SignEditor class
  
• refactor statics in the Stats, Sounds and Shop classes
• update the deprecated method in Shop.java