Removes module Openvault::Datastream. Not currently used.
* Adds 'jetty wrapper' back into Gemfile, to get the rake tasks, e.g. "rake jetty:start". Updates Gemfile.lock.

* Removes unused Openvault::Datastream module and all references thereto.
Removes .rvmrc
Adds library Openvault::MARS for ingesting records from MARS filemaker db. Adds tests and fixtures too.
Adds checking for existence of file in Fixtures::file_path.
* Adds Openvault::Ingester::Mars library for ingesting MARS xml (i.e. exported from filemaker pro) directly.

* Adds the XSL stylesheet for performing xslt translation of MARS xml to PBCore xml.

* Adds tests and fixtures.
Updated fixture to include PBCore collection
Changes Openvault::Ingester::Pbcore.ingest! to return array of newly ingested OpenvaultAsset models. Closes #164.
Adds source_xml data stream to OpenvaultAsset model to store the original xml upon ingest  (e.g. MARS xml, Artesia xml).
Closes #163.
* Adds concurrency to Openvault::Ingester::MARS.ingest! via `celluloid` gem

* Adds handling of tmp files during ingestion of MARS records.
Merged development branch into basic-ingesting.