Add ability to reload test suite without restarting cricket

I've been using cricket-unittest with pyramid for some time. It's a great piece of software, but I've noticed it's missing a feature that would greatly improve it's usability.

When adding/removing test cases cricket needs to be restarted in order to reload all the tests. It would be much more convenient if there would be a button somewhere in cricket window that would reload all tests.

No files or tests are named in the issue. Start by locating the GUI window and the code that discovers and loads test suites, then trace how the running suite is refreshed. Done means a control in the Cricket window reloads added or removed tests without restarting the application.

Written by the indexing model from the issue text.