Added redirect, shows request relevant to role

Now redirects to login if not logged in, shows computer purchases only
if ComputerPurchase
Changed header to Login/out, redirects, css

Added link to request form and added functionality that changes Login
button to message displaying name and a logout button when logged in.

Put in redirects from login to defined pages, and from secure pages
(Purchases only for now) to login if not logged in, or to the
appropriate page if logged in, but accessing other pages.

Added css tags to login, purchases page.
Merge remote-tracking branch 'upstream/master'
Merge pull request #3 from albperez/master

Added redirect, shows request relevant to role