`gem update --system 2.2.3` on travis-ci
setup oss.sonatype.org deployment

needed to do the "install gems" differently since it conflicted with
the main artifact.

if snapshot version ```$mvn deploy``` will deploy the artifact to
https://oss.sonatype.org/content/repositories/snapshots/ and the released
version will go to a staging repository on https://oss.sonatype.org/content/repositories/

it is also possible to use the maven release mantra:
* mvn release:prepare
* mvn release:perform
setup rubygems repository & let us roll jruby-openssl 0.9.6
activate -P jars by default due running with `mvn package` only ...
[travis-ci] exclude all of jruby-head with openjdk6
only run t is1_9 he compat-version spec on JRuby < 9k
[travis-ci] there seems to be a constant failure on TRAVIS=true with the application pool
[travis-ci] jruby-head should be fine ... from now on :over-9000:
better servlet (3.0) specific API testability
support configuration of `Response.swallow_client_abort?` (with e075f34f fixes #186)
just keep the jruby-home when set by jruby to "uri:classsloader:/META-INF/jruby.home"