Add support for GZIP to the APIMiddleware

The API middleware doesn't currently support reading in GZIP values. Add a check for Content-Encoding: GZIP

added Feature Request team:webdev labels

assigned to @zacharysabourin

added statewip label

mentioned in commit zacharysabourin/eclipsefdn-api-common@ba5ee621

mentioned in merge request !38 (merged)

added statereview label and removed statewip label

added statedone label and removed statereview label

closed