Remove 2.7-deprecated pngsave option

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2780 eee81c28-f429-11dd-99c0-75d572ba1ddd
Properly-formed URLs will not have spaces, so no need to replace; no need for "/" escaping unless within HTML doc; properly encode loadingImage window text; support loading of (properly URL encoded) non-base64 "data:image/svg+xml;utf8,"-style data URIs

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2782 eee81c28-f429-11dd-99c0-75d572ba1ddd
Consistently use single quotes (except within XML or for localized strings) for streamlined searching

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2791 eee81c28-f429-11dd-99c0-75d572ba1ddd