update netty version

fixes resource leak in ResourcePool
minor sync fix in ResourcePool
Merge pull request #4 from metamx/upgrade-netty-version

update netty version
add test for close
Merge pull request #5 from metamx/add-test

add test for ResourcePool.close
fix maven + git issues
[maven-release-plugin] prepare release http-client-0.9.2
[maven-release-plugin] prepare for next development iteration
Merge branch 'master' of github.com:metamx/http-client into update-guava
update status response handler to include headers