Update README.md

-al
update rvmrc to 1.9
Merge branch 'master' of github.com:ASCTech/shibboleth-rails
put current_user.id in session for actions that skip require_shib
bump
don't send xhr reqs to root/show
bump
use user_id in session on ajax cuz redirecting to login won't help
bump
support for first_name and last_name from shib
bump
fix bug
gem badge
Remove last request at because its expensive and modifies the user for little gain
Debugging weird routing issue
Wrong logger syntax
Make gem compatible with rails 4
Lookup for user now considers the name_n (in addition to the emplid)
Proper implementation
Another way of finding users