patch handshake.hpp from http://sourceforge.net/p/urdl/issues/7/

Signed-off-by: Jack <jack.wgm@gmail.com>
fix parsers.hpp from avhttp

Signed-off-by: Jack <jack.wgm@gmail.com>
patch istreambuf.ipp from http://sourceforge.net/p/urdl/issues/5/

Signed-off-by: Jack <jack.wgm@gmail.com>
Merge branch 'master' of github.com:Jackarain/urdl

Conflicts:
	include/urdl/detail/parsers.hpp