Add isbn_validation gem to handle isbn validations better
Only display books with a seller

- don't display duplicate books
Saying that a user wants to sell a book adds that book to the "to sell"
list for that user
Add desired books to "To Buy" section of book index
WIP: Working on seller finder
Picked up some straggling
updating login/registration css/styles
Got match mailer working
Fixed the login issue
Merge branch 'implementing-users'
Merge branch 'master' of github.com:dleve123/swap_books
add dont have an accoutn button
Removed debug
Merge branch 'master' of github.com:dleve123/swap_books
Fix invalid CSS
Fix broken match email.

- use email instead of name
Got chat mostly working with dummy hardcoded user values
Full implementation of matching - maybe?

- update seed file
- going to test against a scenario
Finalize matching code

- don't show completed matches (different from scheduled)
- fix variable name for flash messages
Edited SQL stuff to work out