Added additional code for OpenShift deployment.

Note that the hunspell-ffi gem was causing dependency issues at build, so was commented out of the Gemfile.

This deployment includes memcached. In the files '.openshift/action_hooks/build`, memcached is built from source. Then, in `.openshift/action_hooks/post_deploy`, we start memcached and bind it to the correct IP and a high port.

Database configuration no longer includes a hard coded username and password, so interfacing with the openshift postgresql cartridge is possible.