Merge pull request #81 from eperry/master

Enhancements to HTTP.go to parse all Header data
make gofmt
Brought back dedicated Transfer-Enconding field.

This is needed for the http/1.1 "chunked" encoding".
s/status_code/code to not require people to change their Kibana dashboards.

Also changed the case of Headers to headers to be more consistent
with the other fields.