Prepared sample android application.
Improved overall structure by merging Method into Request.
Added Java API for GET requests.
Improved request event handling.
Added POST handling.
Improved error response handling (read from error stream).
Improved write methods to send more appropiate headers if no payload is available.
Added Scala support for HEAD and DELETE.
Added Java support for PUT.
Added Java support for HEAD.
Added Java support for DELETE.
Merge branch 'dev'