Updating language about JaCoCo options
Merge pull request #316 from futures/readme-update

Updating language about JaCoCo options
Filtering out reference properties from RDF output, providing at least some error message for 412 Precondition Failed errors
Merge pull request #317 from futures/filter-reference-props

Filtering out reference properties from RDF output
Refactoring preconditions
Fixing error handling
Doing etag check first like Jersey
Merge pull request #319 from futures/preconditions

Refactoring preconditions
HTTP POST requests should require the POSTed path to exist. PUT requests
should be used when the path-to-the-object is known in advanced.

Updated tests to use server-minted paths or PUT requests to UUID-based
paths as appropriate.

Resolves: https://www.pivotaltracker.com/story/show/70174556
Fix integration tests which were breaking in non-clean builds

Resolves: https://www.pivotaltracker.com/story/show/69740244
Also suppressing weak-reference _ref nodes from output
Merge pull request #328 from futures/suppress-weakref

Also suppressing weak-reference _ref nodes from output

Resolves: https://www.pivotaltracker.com/story/show/70439742
Implement check of HttpRequest for membership in pre-configured roles

Resolves: https://www.pivotaltracker.com/story/show/69444656
Improved lock HTML rendering; added lock link to locked nodes' RDF.
Addressed PR comments.