Remove un-used method from the Model API
Order the results of the by_ip method of Connection
Add parental class of all unit-tests for faitout
Add the Model unit-tests of faitout
Add unit-tests for faitoutlib
Update requirements to include mock
Add a local copy of nosetests for compatibility between Fedora and EL
Ignore some methods from faitoutlib

These methods cannot be tested without an administrator access to a postgresql
database and this is not acceptable in a unit-tests context.
Add utility script to run the unit-tests
Pep8 clean up