- Use long version of options
- Moar comments!
- Allow verbosity to be specified

Faster tests are faster.

Test suite time has halved.

* Doesn't use progressive plugin on travis (which made the console
  output unreadable).
* Allows arbitrary nose options to be used with ./runtests.py.  Before,
  they might get clobbered.
* Avoid dupliation issue with nose picking up options independentally
  from the testrunner script

Default behaviour is still the same.

It's a more up-to-date version of the same thing.

This allows an autocompleter to be written for faster test lookups.

These were getting annoying for normal runs.

Nose seems to pick up argv automatically - which is annoying.  Will need
to look into at some point.

Plus tweaks to test method names

Also split them into unit and functional tests.

Looks up all shipping methods for a basket and picks the first one to
form the estimate.