Renamed uwsgi_response to http_response
Moved request/response state enum into its own header
http_response: removed http_state enum
dispatcher: Add first_worker() helper method
tasks/Makefile: Added DEBUG cfg var and tools src files
tasks/dispatcher.h: Access first_worker pointer directly
Refactured and extended http code

Added http_base class and moved a lot of code from http_request and http_response.

Added support for reading http responses.
itostr: Moved globals into its own cpp file to avoid linker errors
buffer: Added offset getter
Makefile: Turn of jobserver mode for examples