Launch Enchantment

A simple Minecraft mod that adds one enchantment to the game, the Launch enchantment. It lets players that have it on their leggings jump 2 blocks high as well as hold shift to charge up super jumps based on the enchantment's level. In order to jump after charging up, press the space bar without letting go of shift until you leave the ground.

If anyone has suggestions for code style or anything, let me know. This is my first MC mod and I have no idea what conventions are. Thanks!