Update to use newer riemann 0.2.6
Switch from undeclared dependency on clj-json to declared dependency on cheshire
[cleanup] Delete trailing whitespace.
Exclude some dependencies from riemann to silence lein warnings.
Use riemann's plugin interface to declare ourselves as a plugin.
Delete unneeded :main lein declaration.
Merge pull request #1 from mojotech/cas/updates

Cas/updates