Removed resource routes for sessions.  Not needed.
Flash alert being created properly.  If unable to log in, redirects to log_in_path with newly created msg, rather than rendering an unused session action
Flash message properly displayed when email or password are invalid.  Added a link_to the sign_up_path.
Added Post route for Log In as sessions_path.

Added squeel Gem to allow for easier case-insensitive database queries.
Form tag changed to newly created sessions_path
When authenticating a user, we now use a case insensitive lookup for the user's email.
Added email format validation during account creation
Added validation for password during account creation.  Must be within 6-20 characters
Added link to log in page from sign up page