styled the readme
Merge branch 'staging'

addming changes from yesterday
Make source materials visible to users with permission to see them
Don't show source materials that a user doesn't have permission to see.
Fix signing up feature, take user to alternative confirmation page.
Restrict reading tickets to correct project scope
Restrict creating tickets to only users with permission to do so.
Restrict ticket updating to only those who have permission.
Restrict destroy action to only people with permission.
Restrict actions in the CharactersController based on permissions and hide links.
Add permissions screen for admins
Add creating, editing, updating and deleting characters to assigning permissions interface.
All tests passing and fine grained authorization ready for staging.