Rhizome cleanup will now expire payloads and vacuum the db file.
Refactor Java API

Add stateful class to represent the state of the serval daemon, shifting some functions from BatPhone
Add convenience functions to get pre-configured MDP and HTTP Restful client classes
Rename mdp lookup helper function to match class name
MeshMS RESTful API stricter on incoming form data

/restful/meshms/SID/SID/sendmessage now enforces Content-Disposition:
form-data (was ignoring), and enforces Content-Type: text/plain;
charset=utf-8 (was ignoring)

New negative test cases to ensure that these are treated strictly
MeshMS Java API: send message