Gossyper may start Gossyp

* Add rake task to run all tests
* Outline gossyper may create discussion feature
* Protect /gossyps/new from guests
* Write test to ensure gossyper may create discussion
* Gossyper may create a Gossyp
* Gossyp requires title and body
Merge pr#4 'gossyp_may_create_discussion_with_title_and_body_squashed'