Add fancy box styles/javascript/images to _static

Hoping this will get the RTD build to work properly....
Update to fancy box v2, BUT...

...rename the files as though they were v1.3.4 so I don't have to modify the sphinx extension yet.
Add fancybox v2 images
Replace fancy box files in _static with pip requirement to install from my fancybox-v2 branch
Fix format of git url
Put fancybox 2 files back into top-level _static
Revert "Put fancybox 2 files back into top-level _static"

This reverts commit 1fb2219ae831ba132fa974a3c54b7514b4c1d0af.
Remove pillow because it is included in the requirements for fancybox
Put pillow back
Merge branch 'explicit-fancybox'