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 it is required to override customized Transport for apiserver Proxy to update HTTPResponse pointing to proper minion.
* Now minion information can be queried as: 1) id=${minion}&query=/stats// or 2) id=${minion}&query=logs/
Additional thought: query parameters are not supposed to be order-sensitive, but I think yours are, considering the way you construct this in your transport function. I'd suggest using a parsed URL object to set query parameters there to remove that order dependency, and maybe even consider using a path instead of query parameters at all (example in a previous comment).