Stuff!

Added a battery (no recipe yet)
Added a WarpBlockContainer class which listens for block updates and if
its tile entity implements IBlockUpdateDetector passes those to it.
Added a WarpEnergyStoreTE which should keep track of connections to
IEnergyHandlers nearby and dump energy into them.
Changed TileEntityPowerReactor to extend WarpEnergyStoreTE and removed
all of the now redundant code (YAY!)
Started work on the upgrades things.
Things.
More Things.
Stuff.
Recipes and gubbins :)