Fail early and with useful message if user omits scheme in ES server
URL.
Merge pull request #1070 from mozilla-services/elasticsearch-url-scheme

Fail early and with useful message if user omits scheme in ES server
Added cbuf librato encoder.
Some basic tests.
Incorporate review feedback, better headers parsing, account for
annotations.
Add omitted time.Millisecond duration to ES output's http timeout
calculation (thanks @validname).
Set input buffer to beginning instead of end.
Merge pull request #1083 from mozilla-services/flood-payload-size

Set input buffer to beginning instead of end.
Remove unnecessary or clause.
Merge pull request #1076 from mozilla-services/librato-cbuf-encoder

Librato cbuf encoder
Merge branch 'versions/0.7' into fix_elasticsearch_timeout

Conflicts:
	CHANGES.txt
Merge pull request #1086 from mozilla-services/fix_elasticsearch_timeout

Fix elasticsearch timeout
Merge branch 'versions/0.7' into dev