Add support to query kubelet's logs and cadvisor's stats through apiserver  by passing rawquery.

* Also add a thirdparty library: code.google.com/p/go.net/html since I need to overrides Transport to update HTTPResponse
* Now minion information can be queried as: 
1) id=${minion}&query=/stats/<podid>/<containerName> or
2) id=${minion}&query=logs/