Ipns name resolution

This branch is not yet complete, but before i move forward, the name resolution code (in namesys) needs some critiquing. There are also a decent number of bugfixes in this branch that i ran into while trying to get the code to a point where i could test ipns.
```
num := runtime.NumCPU()
	runtime.GOMAXPROCS(num)
```

Re: GOMAXPROCS
> This call will go away when the scheduler improves.