[NEW] Initial backend for a better tracker export, supporting multiple output formats and complex values

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@52646 b456876b-0849-0410-b77d-98878d47e9d5
[NEW] navbars: New collapse button module, designed to allow a collapse button to operate in a navbar on more than just menus - doesn't quite work for me yet but committing it in the hope other Bootstrap Gurus can help out!

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@52647 b456876b-0849-0410-b77d-98878d47e9d5