restyled story list page
Moved short title method into story model
Restyled login and signup forms, fixed error messages
Styled error flash for login form
Minor JS refactor

* Moved tour function out of global
* Moved next arrow listener into proper function
Style tweaks - add border below clusters
Fixed label names on registration form
Reverted changes to story json to fix tour page
Added favicon
Merge pull request #131 from apesic/restyle

Improved error feedback for login/signup, restyled story list