Merge pull request #1086 from jburel/rebased/develop/big-image-compression

set the compression to high for big images (see #10759) (rebased onto develop)
travis: Install python-genshi
Blitz image.getFileset() method
Templates use img.fileset.id.val don't load filesets
Show fileset thumbnails in right panel for Images
webgateway birds_eye_view uses thumbnail. See #10626
Big Image zooms out to fit window by default. See #8475
Removed rendering query from birds_eye_view src. See #10626

Since we are just using the thumbnail here, we don't want to make a new request to server when
the rendering settings change. Browser can reuse the thumbnail it already has
Only _load() viewport ONCE on Rendering Save/reset

This bug was causing setupTiles() to be called mulitiple times, which resulted in
many unecessary tiles being requested by the big image viewer
On rendering settings save, refresh viewer AFTER save

The saveImgRDef request fails in very big images because it happens at the same time as
many tiles are being requested. See http://trac.openmicroscopy.org.uk/ome/ticket/10660
Adding Thumbnail_Figure to Publications menu
New base.html for Script UI dialogs. Thumbs script fields
Adding Tags to Thumbnail_Figure UI
Sort & group thumbs by selected Tags
Improved layout of tag sorting in table of thumbs
Only load Tags that are used on thumbnails
Support loading thumbs via 'Dataset'
Removing duplicate Tags
Tag sorting within Datasets of thumbs
Show 'untagged' images checkbox updates UI