Updating demo.htm to include new demo case for <input> elements.
Adding ability to use the plugin on <input> elements.
Fixing scrollbar-related highlighting issues.

Tested in recent versions of Chrome, Firefox, Safari, and IE8.  All
functional except for IE.  I'll let someone else tackle that one. :)
Merge branch 'input-elements'
Updating README to reflect the fact that the plugin now supports <input> elements.
Fixes suggested by mistic100

Ahh, yes, I see the problem with the way getScrollbarWidth() is
incorporated.  Perhaps I’m hacking together this fix a bit too quickly.
:)  The scrollbar width is now calculated in the plugin’s init.  Thanks
for noticing that.

Also, I’ve updated getScrollbarWidth() to use Ben Alman’s
implementation
(http://benalman.com/projects/jquery-misc-plugins/#scrollbarwidth)

As far as I can tell, Firefox provides an incomplete implementation of
scrollLeft().  Without it, I’m not sure how to implement this
functionality.  The good news is that it seems to be fixed in FF 27
(https://bugzilla.mozilla.org/show_bug.cgi?id=717878).  I tested this
existing implementation against Firefox Nightly (29.0), and it seems to
work as expected.
Removing stray console.log().
Adding select event bindings to respond to mouse highlighting (which changes the horizontal offset of the input element)
Respond to horizontal mouse scrolling (again, we can't use the scroll event, so this is the second best option.  Feel free to comment out the mouseover and mouseout handlers if you can't spare the extra CPU required for polling)
Merge pull request #22 from rinogo/master

Adding support for the <input> element and fixing scrollbar-related bugs.