Replace embedded _links with Link(-Template) header

Signed-off-by: Don Naegely <naegelyd@gmail.com>
Merge pull request #234 from cbmi/issue-205

Replace embedded _links with Link(-Template) header
Include field-dimensions in field link templates

Signed-off-by: Don Naegely <naegelyd@gmail.com>
Fix incorrect link key names

These were mislabeled during the transition from raw link data in the response to link(-template) header fields.

Signed-off-by: Don Naegely <naegelyd@gmail.com>
Include a flag in fields to indicate stats support

Previously, this was done by just not sending back the stats link but we are using link templates now at the collection level so without this flag, clients will think all fields are stats capable.

Signed-off-by: Don Naegely <naegelyd@gmail.com>
Merge pull request #236 from cbmi/stats-flag

Include a flag in fields to indicate stats support
Remove metadata from preview endpoint response

Signed-off-by: Don Naegely <naegelyd@gmail.com>