added support for streams (POST/PUT), content-type header in params now case insensitive, added streaming tests and examples
Merge remote-tracking branch 'upstream/master'
bug fix: check for Readable instead of ReadStream, added PATCH method support for streaming
deleted accidentally committed file
fix: on POST/PUT/PATCH we check for Stream instead of Readable

this will allow us to use https://github.com/felixge/node-form-data to send mulitpart/form-data requests.
Merge branch 'master' of https://github.com/kreutter/frisby
fix: do not stringily outgoing.body if it is a Stream and not only a fs.ReadStream
added example and tests for supporting multipart/form-data (browser file upload)
Removed Frisby prefix from test