Updated to 1.7.10

Was waiting on LiteLoader 1.7.10 support from ForgeGradle, and since it was taking a while, I decided to make the PR to the FG repository myself! It was accepted, so I was able to update to 1.7.10 for you. The only real error was in the IC2Power, where get energy value now returns a double instead of an int. Also cleaned up some deprecation warnings.