Display Hire Me feature and Refactoring Cucumber Scenarios

https://www.pivotaltracker.com/story/show/67380812
https://www.pivotaltracker.com/story/show/67243926

* Display hire me feature implemented with cucumber scenarios and specs
* Added in specs for profile privacy features
* Moved Articles Preview Scenario from Cucumber to Poltergeist.
* Refactored few Cucumber Steps