Initial RF energy port

I believe, from my testing done on my server, as well as some private testing, that this is good enough as a first attempt at a Redstone Flux port of BuildCraft.

Some notes:
- We need to have some aspects of power pipe behaviour re-discussed. I left those changes for separate PRs, though.
- There are still some minor bugs with power pipes, but those are going to be covered in the re-discussion.
- Engines currently emit constant power. This is a temporary measure - once power pipe tweaks are finished, I plan to rewrite engines to make them work in a way similar to how they did before with RF.
- It is good enough to release and I have tested it, but might still need some tweaks in the behaviour of specific machines.
- No perdition. Perdition will come during the re-discussion as well.

So, yes, it works, it doesn't replicate BuildCraft's MJ perfectly yet but I'd prefer to discuss some things with ST rather than making those decisions myself.

Have fun.