First pass at using omnibus
Remove files that are not used anymore
Revert "Change the user whichs runs the agent from dd-agent to datadog"

This reverts commit 24dfa13c30ec940699246d4ed40dc3aec686f9a6.
Do not uninstall de-agent user on upgrade

And recreate it if it was done
Fix line break on centos init script
Another fix in line break
Fix elastic search check

* Make check working on python 2.4
* Make check working on ES version 0.90.12 and higher (but lower than
1.0.0)
* Have proper behavior on newer versions of ES
* Remove unused code
Add a bind_host parameter to support Openshift integration (localhost
can't be used)
Make sure to raise unexpected exceptions
More information on how to configure in the docker conf file
Fix warning in ES check
Catch when we can't open cgroup file in docker information
Remove some unused tags in google compute integration
Fix ES test
Fix forwarder on tornado 3.x

In newer versions of tornado, tornado will try to bind localhost to ::1
(ipv6 address) even though ipv6 might not be functional on the system.
It happened on a Google Compute Engine instance.
So we should fall back to 127.0.0.1 if it happens.
Be consistent in logger name
Typo
Remove some unsupported check on windows
Upgrade to last version of jmxfetch
Update CHANGELOG.md