Fixing data bag encryption.

Now encrypting data bags correctly, such that they can be read by Chef.

Setup instructions in the readme have been updated.
Adding support for additional CLI monitor params.

You can now pass additional parameters when adding a monitor by
providing a "params" hash. List of supported additional parameters can
be found at
http://docs.splunk.com/Documentation/Storm/latest/User/CLIcommandsforinput.