Initial import of files copied from http-streams
Add RequestBuilder to module exports
Refactor Network.Http.Types to .Internal
Improve hiding of internal modules
Improve module documentation
Create class for types with Headers
Document HttpType class
Improve haddoc documentation for headers methods
Align version number with http-streams API
Spelling error: retreiveHeaders -> retrieveHeaders
Merge pull request #1 from MichaelXavier/retrieveHeaders-typo

Spelling error: retreiveHeaders -> retrieveHeaders
Merge remote-tracking branch 'upstream/master'