FireWorks

1.1.1 -- Added sign 'power' and 'height' functionality; (Place a sign under the wool block, with the word 'firework' on line 1, and then on line 2 and 3 separately place '^'s for height increase and '*'s for power increase)

1.0.1 -- Compiled with JDK6 instead of 7.

1.0 -- Fixed some bugs. Cleaned up the code.