using ~> 1.1.0 riak-client (JRuby FIFO bug in 1.0.x) https://github.com/basho/riak-ruby-client/commit/84c272da2a760da5ad0a0c72c2be6a2b379b9dfc
Merge pull request #308 from bavaro/master

bump riak-client to 1.1.x
Avoid overwriting rails db:* rake tasks

Closes #312.
Merge pull request #313 from mfilej/rake-tasks-isolation

Avoid overwriting rails db:* rake tasks
Allow adding previously embedded objects

For the times when you have an embedded :many and an embedded :one, it's
now ok to add the :one to the :many without getting an ArgumentError for
invalid_value caused by the type verification.