Gemfile upgrade including new Capistrano 3.x
Data rake task to dump and load mongo/elasticsearch

Rake task to dump and load all data. Requires a target/source directory.

rake data:dump DIR=/target/directory
rake data:load DIR=/source/directory

Mongo data is exported, renamed to rcrm-mongo, tarred, and gzipped into
rcrm-mongo.tgz. The elasticsearch data is exported into zip files
matching the elasticsearch index names.

Data:load reverses the process.