configure.ac: Update PICKY_CXXFLAGS to include language in preprocessor
Factor out HTTPMessage from HTTPRequest/HTTPResponse
Get rid of another CRLF
Convert over HTTPResponse, HTTPResponseParser
Further refactor
Fix bugs in string comparison, parsing_step termination
poller.cc: Get correct termination conditions in both directions
Introduce Body Parser with three working modes (Rules 1, 3, 5)
Cleanups and fill in where ChunkedBodyParser should go