Merge pull request #30 from RonnieSkansing/master

align ident for use and const / add check if serializeable
fixed Set-Cookie to uppercase to avoid undefined index
changed whitelist to lib to ensure code coverage covers the libary
Fix potential for inconsistent header field cases mappings
Merge branch 'master' of github.com:rdlowrey/Arya

Conflicts:
	lib/Response.php
Merge remote-tracking branch 'upstream/master'
return  on SET-COOKIE header instead of NULL
added Response unittest