Add marathon-client.py to the list of clients
Upgrade to React 0.10.0

* Clone children of FormGroupComponent per React best practices to
  prevent modifying children not owned by FormGroupComponent.
Upgrade react-tools to 0.10.0, match react.js version
Remove incorrectly-linked jQuery source map
Merge pull request #256 from MiLk/marathon-client.py

Add marathon-client.py to the list of clients
Merge pull request #250 from mesosphere/upgrade-react

Upgrade to React 0.10.0