Add dynamic quick search in TOC

Quick search matches items and retains their tree structure. Search is fired only after the user has finished typing.

Signed-off-by: Kaustav Das Modak <kaustav.dasmodak@yahoo.co.in>
Fire search at regular intervals if user keeps on typing
Merge pull request #13 from kaustavdm/toc-search

Add dynamic quick search in TOC