Skins and Groups Update

Added option to set a player skin for units with Lib's Disguises

• Config option is called "disguiseSkin"
• Set it to the name of the player whose skin you want to use
  • eg: disguiseSkin: Scyntrus
• Not set by default, must be manually added

Added command to save and load selections of units

• To save your selection:
  • /fm group set NUMBER
• To load a selection:
  • /fm group NUMBER
• NUMBER must be between 1 and 5

New strings have been added to the messages.yml file.