Define content negotiation and default format for paths ending in /$value, /$count, /$metadata and /$batch

Content negotiation with Accept header and $format is allowed for paths ending in /$value. Content negotiation for paths in ending in /$count is not allowed, the result is always text/plain Content negotiation for /$batch is not allowed, the result is always multipart/mixed. Content negotiation for /$metadata is allowed, but the media types application/atom+xml and application/json and its sub-types and parameterized variants are reserved for future versions of this specification. Accepted: https://www.oasis-open.org/committees/download.php/49375/odata-meeting-39_on-20130530-minutes.html#odata-417

https://www.oasis-open.org/committees/download.php/49406/odata-v4.0-wd02-part2-url-conventions-2013-06-04.docx https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/spec/ABNF/odata-abnf-construction-rules.txt?rev=338 https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/spec/ABNF/odata-abnf-testcases.xml?rev=338 https://www.oasis-open.org/committees/download.php/49403/odata-atom-format-v4.0-wd02-2013-06-04.docx https://www.oasis-open.org/committees/download.php/49404/odata-json-format-v4.0-wd02-2013-06-04.docx Accepted: https://www.oasis-open.org/committees/download.php/49557/odata-meeting-41_on-20130613_14-F2F-minutes.html#odata-417