Move dashboard removal functions into a class
Provide custom footer update text in the dashboard

Introduces global versions for the WordPress changeset and WSUWP
version that are in production.
Additional custom text and the WSU shield in the footer
The actual shield displayed in the footer
Enable the network dashboard's Right Now widget
Merge pull request #65 from washingtonstateuniversity/dashboard

[PR] Add some friendly WSU to the admin dashboard.