server_opensave-related changes: 1) Be more lenient in filename possibilities for server_opensave (supporting Unicode except characters disallowed in Windows file names); 2) XHTML escape filename and SVG content when put into HTML hidden input element as opposed to unnecessary URL-encoding; 3) fix base64 encoding (with update to dependent utf8-encoding function)--old base64 code caused SVG to break with surrogate pairs (e.g., in title); 4) provide default UTF-8 encoding in XML declaration and add this XML declaration to the download attribute as well

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2662 eee81c28-f429-11dd-99c0-75d572ba1ddd
Avoid URL decoding; remove dead code; add encoding to XML Declaration in php_savefile extension

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2663 eee81c28-f429-11dd-99c0-75d572ba1ddd
Fix charset addition for ext-server_opensave.js

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2664 eee81c28-f429-11dd-99c0-75d572ba1ddd
Safer XHTML escape

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2665 eee81c28-f429-11dd-99c0-75d572ba1ddd