ALM-594 use dalli/memcached for session store
ALM-607 adjust size of search button
ALM-592 store status timestamp in Rails cache instead of CouchDB
ALM-607 show label for working sources
updated external cookbooks
ALM-35 updated sources in seeds.rb template in alm cookbook
updated Cheffile for external cookbooks
ALM-35 moved source-specific validations into state machine