Use newer versions of most dependencies
[#eng-5593] bump to 0.90.10-SNAPSHOT
[#eng-5593] bump ES and Jetty dependencies

and changes to satisfy API changes in ES 0.90.10
[#eng-5593] update README
[#eng-5883] don't bump es and jetty here, but further updates to deps
Merge branch 'benmccann-upgrade-deps' into eng-5593-es-0.90.10-upgrade
[#eng-5593] another day another version. 0.90.12 is out.
[#eng-5593] reindent pom.xml
Merge branch 'eng-5593-es-0.90.10-upgrade'
Release 0.90.12