- This now works just fine.

- Next up is (1) refactoring, (2) cleanup of the received ULO/RDF
  files and (3) better state information (for the web interface)

We now run jobs w/o limits. This is probably bad in a hosted setup but
we can worry about that later should it ever become a problem. As it
stands the implementation is easier with a simple goroutine rather than
a complicated pool of threads.

- Not perfect yet. I think Job should be a struct so
  Collector can modify its members easily.