fixed pinterest.com for recent site changes
Version 3.3beta1
Fixed #140: OS X full screen Mode switches to another space when a thumbnail is shown

Needs more testing, esp. on Windows and Linux.
Change is to add level="top" to <panel>.
Fixed #185: on imgur.com must hover center of thumb to get full pop-up

Two fixes:
1. added logic to detect bottom and top third, and adjust what node it
uses so it still finds the correct img node.

2. changed Others Indirect to remove "?fb" from URL, as suggested
by Hakkin.

Note: with these fixes, the specific problem raised in this
issue is fixed but a problem remains: when hovering
a thumb for a multi-image gallery on imgur.com,
it shows just a single image (unless you hover one of
the textual links).
refines previous fix for #185: on imgur.com must hover center of thumb to get full pop-up

Now forces it not to use the Imgur or Thumbnail rule if the thumbnail is
linked to an imgur gallery.  Instead, it'll use the Others (Indirect) rule
(if enabled) so it can detect if it's a multi-image gallery, and handle it
appropriately.  Fixes that it wasn't showing as gallery, though it'll be
a little slower.
More imgur.com fixes: links to /gallery/ pages; prevent showing 1st thumb twice.

Note that it still has trouble with some gif pages like
https://imgur.com/gallery/fL5hBcp , where it doesn't show a pop-up.
Previously it showed ai pop-up containing imgur's error text.
The problem is that the .gif doesn't appear in an og:image now
an <img> since it uses  a <video> tag.
Fixed typos in comments; removed dead code.
Fixed #187: Doesn't work with Dropbox links