Added contact info page.
Remove some repetition in the spec.

Use a variable for the app title
instead of repeating it in every individual title test.
Created helper function for title generation, used it in layout.

Functional difference is that if a page title is not defined,
now the title will be the base title alone, no bar at the end.
Use base title alone for the Home page.

Remove the " | Home" at the end of the Home page title.
Title is taken care of automatically by template.
Add stylesheets to improve the look of the site.
Add routes to enable internal links and create desired URLs.
Add users controller and sign up page.

Improve style of rspec files.