* added default module django_q
* set build mode to nit-picky
* warnings raise errors
Want to make sure the docs are neat and build on Travis , to make it easier to accept doc pull requests
* added a synchronous cluster simulation
* added a test for the sync function
* moved signing into its own module
* refactored imports to solve circular import problems stemming from the task module pretending to be a cluster
* added documentation for the new sync option
Ilan