Search Implementation and Query Type

* adds functionality to http.go for encoding querystrings
* Consistency fis for JSONClass field name across the board (JsonClass)
  Sorry bout this, but it came up while i was thinkinga bout decoding
  the returned objects. I can bust it out if it's anoying
* new search.go and examples implementing standard search
Merge pull request #52 from go-chef/search

Search Implementation and Query Type