ElasticSearch agent check should only query the local node.
Add a service check for Riak.

Remove the timeout and status code events because they provide the
same functionality as a monitor on this service check.
Add a service check for Couchbase.

- With a test that should work without Couchbase running (testing
  failure)
- Also cleaned up some pre-omnibus code checking the Python version.
:neckbeard: Update yaml examples spacing

Consolidate all spacing in example files to be 2-spaced to reduce
potential for malformed configurations.
:neckbeard: provide sane defaults and fix a few typos

Sane defaults should work in most cases - tags are typically optional
and we should provide examples on how they are specified, but not
activate them by default.
Merge pull request #1200 from DataDog/conor/couchbase-service-check

Add a service check for Couchbase.
Merge pull request #1187 from DataDog/conor/riak-service-check

Add a service check for Riak.
Merge pull request #1246 from DataDog/miketheman/yaml

:neckbeard: Update yaml examples spacing
Merge pull request #1181 from jonaf/master

ElasticSearch agent check should only query the local node.
Include evencode as paramter
update yaml file for event_id
remove extra line