HtmlUnit-2.34.1

A small bugfix release required to make alle HtmlUnit Driver tests green

• fix insert position for elements with contenteditable='true'
• send 'image/png' as mime type when uploading a png file

HtmlUnit-2.34.0

• bugfixes
• again many Rhino improvements
• cssparser no longer requires sac13
• neko fixes

HtmlUnit-2.33

• source moved to GitHub
• reworked JS event listeners
• bugfixes