Updated BCHTTPRequest/BCHTTPResponse

theses classes should mimic their equivalent
NSURLRequest/NSHTTPURLResponse pairs.
Update Tests
Request and Response API
Request and Response API

Handle the connection API through BCHTTPRequest and BCHTTPResponse
objects
Test for new API
Update README.md
Update README
Clean code
sendRequest: shortcut method
Merge pull request #1 from ilbesculpi/branch-new-api

Request and Response API