first steps to getting shiro auth in
use jersey2 via netty for REST API

implement Metrics filters for jersey2
use Jersey 2 injection for access to Core.class in rest resources
fixed path for test
this needs the currently unreleased org.graylog2:jersey-netty module (also on github)
Merge remote-tracking branch 'origin/play' into play-shiro
Merge remote-tracking branch 'private/play' into play-shiro
Merge remote-tracking branch 'origin/play' into play-shiro
Merge remote-tracking branch 'origin/play' into play-shiro
only allow alphanumeric target field names in extractors. fixes #164
work on substring extractors
substring extractor higlighting, highltng fixes
completed substring extractors
load user via authenticated REST call
Merge remote-tracking branch 'origin/play' into play-shiro
working implementation of converters
include converters in overview
finished converter integration
fix broken manual extractor message select
new converters: syslog PRI
log the supplied user name for authc failures
update travis ci play dependency
improve extractors UI. fixes #179