Throttling, debouncing and callbacks

Added throttling and debouncing for the scroll and resize events respectively. Moved the onScroll callback so that it more reliably fires.

Navigation updates

The behaviour of the navigation has been updated so that now any page with an ID will be navigable by prev/next or key shortcuts, and have the hash updated, but will not show in the nav unless a data-title attribute is present. If neither an ID or data-title are provided, then the page will not be active in either.

Also, fixes to the initial page setting on load to fix some scroll issues when trying to scroll the page immediately.

Rewrite of plugin, added docs

1.2.0

Update readme

Additional options, cleanup, and streamlining.

v1.0.1

Update release number

Initial release

First version, warts and all.