Update timecop dependency to version 0.5.9
Update crack dependency to version 0.3.2
Update newrelic_rpm dependency to version 3.5.5.38
Update ffi dependency to version 1.3.1
Update will_paginate dependency to version 3.0.4
Update net-ssh dependency to version 2.6.3
Update capistrano dependency to version 2.14.1
Update rack dependency to version 1.4.4
migration, controller, and view portion of gittip integration.  callbacks to gittip next.
link to gittip from gem page if gittip_enabled?
second draft of rubygems side of gittip integration.
Updated presentation/some logic based on talk in #500.
Remove now unnecessary rubygems_controller changes.