adding a command-line utility for executing common testing functions
missing delete function on config.
new katest management command "clean_db"
preventing central-server regret
refactor confirm logic in katest clean_db
Merge remote-tracking branch 'gimick/katest_tool' into katest_tool

Conflicts:
	kalite/management/commands/katest.py
Merge pull request #273 from bcipolli/katest_tool

adding a command-line utility for executing common testing functions

This is test-only code that has been tested and reviewed.  No reason not to merge.