generate link scaffold
Add devise and create User Model
Establish relationship, view permission, and authorization between users
and links.

add bootstrap
bootstrap required in all the right places
Add structure and basic styling.
Implement Up/Downvoting for Links.
add readme

update readme
Comments can now be made on a link by a signed_in user. A user can only
destroy a comment made by herself.

asdf
update readme.md
- Users have usernames
    - Devise configured in application_controller to
accept :username params
- Views updated to show username instead of
email
Sign Up page accepts username field. Account link now displays user name instead of 'Account'
Voting on links from Index happens without refreshing! Still need to
mod show view.