Basic synchronous timing out, urllib request.
Start building out the unittest framework
Remove namespace constraints (there's more than 2)!
Header specification now a constructor parameter

The default is: 'namecoin.dns'
Add host override to lookup
Remove urlencoding, fix error message
Use logging, per dionyziz's instruction
Leverage logging error reporting for cleaner code.
Merge pull request #10 from okTurtles/2_implement_lookup_3

2 implement lookup 3. Closes #2.