Update to v2.1 release of upstream http_parser
Adjust makefile for OSX.  Closes #5
Fixed Makefile for OS X Mavericks
Merge github.com:creationix/lhttp_parser

Conflicts:
	Makefile
Oups, reverting mistake.
Merge pull request #7 from clementfarabet/master

Fixed Makefile for OSX (Mavericks)
Allow building against system LuaJIT