added users to project, updated Devise views
modified devise
added devise secret key
Set User permissions added current-user? helper method

Signed-off-by: Wali Akande <eskadah@gmail.com>
modified action callbacks in listings controller
modified seller page; added bootstrap styling
made changes to homepage
adjusted custom css for erb pre-processing
added orders
Merge pull request #2 from eskadah/master

Master