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.
can we have one place to turn this on and off? maybe in the `main` entry point?  (or perhaps just move straight to `--debug`)