[Plotz] Greetings 0.7

Nice little messages for when you enter a plot

  1. Plotz 3.8 compatibility

    kyle
    ^
  2. Blank custom greeting

    kyle
    Added the ability to add a blank custom greeting.
    /plot greet none
  3. Fixes NPE I just noticed :P

    kyle
    Title ^
  4. Plotz 2.5+ compatability fixes

    kyle
    Title says it all
  5. Plotz 2.2+ support

    kyle
    Title says it all
  6. Java 7 compatibility

    kyle
    Title says it all