Merge pull request #202 from goodscloud/set-hybrid-property-with-post

fix POSTing to hybrid properties with expressions and setters
Record CHANGES due to previous commit.
Adds Location header in POST and Link header in GET
Requests require appropriate Content-Type.
allow disabling deep results per-request

originally by @johaness
allow fine grained control of relations included in output
HACK bump version number so install process finds ours first