Add a new structure to handle Sessions
Define project sessions form in project form, also make necessary arrangements so the new pages work with this new structure
Changes dynamic nested forms in project/form to use Cocoon
Fixes based on the To-do list:
-Set authentication to controllers
-Remove message about deprecation in devise_for
-Lock initial field to one character in Project form
-Use FactoryGirl abbreviations when possible
-Fix specs due integration of devise in controllers
First approach to make a many-to-many relationship between the students and their references
Use SettingsLogic gem to store the 'days to application deadline' value
Handle authentication for Student/FieldHost:
-If there's a current login prefill the corresponding form
-Otherwise sign in the login after create it
-Also include an small adjustment in Student dashboard
Basic specs for controllers
Only log in during setup if fields were saved correctly.
Fix broken migration.

Application deadline is never created when migrating from scratch.
Probably a remnant from a now non-existing migration.
Basic styling for project sessions.
Correct selector used for student application deadline after style changes.
Fix broken "remove" button for session periods after style changes.
Minor adjustments to session period remove button layout.
Updating structure.sql
Merge pull request #10 from ipoconnection/project_sessions_dev

Define Project session form and other stuff