added project name and GPL notice and fixed missing ; in some style rules

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/simplewebkit/trunk@36560 72102866-910b-0410-8b05-ffd578937521
fixed handling of unknown function, e.g. style { attrib: alpha(something); } - this did leak and lead to issue #434

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/simplewebkit/trunk@36561 72102866-910b-0410-8b05-ffd578937521