Add deployment information

DEPLOYMENT

+Deploying the UNL Search website
+============================================
+
+Prerequisites
+-------------
+The developer needs a SSH account on `www1.unl.edu` and
+has to be in the `ucomm` group.
+
+
+Local setup
+-----------
+::
+
+$ git remote add live ssh://www1.unl.edu/var/www/html/www1.unl.edu/search
+
+Deployment
+----------
+::
+
+$ git push live master