Prevent sticky table headers showing up in Ctrl+F search results

Fix that allows sticky tables to be nested

Added a warning message when sticky table headers are used on a table without any columns

Fix for static tables with sticky headers applied

Fix nested sticky table headers

Updated the constructor so it no longer ignores the containerClass option

Updated the internals to work better with transparent headings and improve performance

A boolean to determine whether to always display the sticky headers even when the table cannot be scrolled.

Added a module for giving html tables sticky headers.