Merge pull request #1 from EOengineer/creating_authentication

Creating authentication
tests written, database migrations and form fields in place.
drop down menus now dropping down.  Still nil.
updated strong params on studies class to access to data layer.
acceptance tests passing for new study, added basic unit tests and validations.
added unit testing for associations.  Tests are passing.
addtional validations placed on study class.
added depandent nullify to related models.
added initial styling to new study form.
additional styling added.
Merge remote-tracking branch 'origin/user_posts_a_new_study'

not sure what happened# the commit.
repairing cdd issue
studies now belong to a user.
added database cleaner, updated post study feature with more robust testing.
added additional unit tests for user and studies classes