Default to not doing so except for in standalone viewer.

* Upgrade dockerfile to ubuntu 20.04

* Delete apt list files

Previously, one could generate a tile set that had the second level resolution
equal to the tile resolution, so it only had one tile per face.

Signed-off-by: Vanessa Sochat <vsochat@stanford.edu>

Signed-off-by: Vanessa Sochat <vsochat@stanford.edu>

try adding circle config (#1)

* adding automated tests to run on Circle with selenium, still need to add screenshots
Signed-off-by: Vanessa Sochat <vsochat@stanford.edu>

Try taking screenshot (#2)

Adding screenshots (working) back in to tests, ready to PR to upstream
Signed-off-by: Vanessa Sochat <vsochat@stanford.edu>

Don't include driver binaries.

Take screenshot of only viewer element.

Don't remove Travis config, at least for now.

Run Black on tests script.

Fix automated tests for Firefox and some formatting changes.

Update test documentation.

Change computation of cube size - taking haov into account

* support also partial cubemap/fallback images: backgroundColor for missing face(s)

* extend multires/generate.py to cylindrical input and partial panoramas

* fixed a few typos in new help strings of generate.py

* Missing cubemap faces now need to be defined as null in the configuration

* made generate.py strict again on existing output directory, printing descriptive error message

* replaced unsafe eval by ast.literal_eval in generate.py

* a couple of minor improvements regarding 'undefined' in libpannellum.js

* made generate.py allow existing output directory in debug mode

for convenience, no need to delete output directory every time while testing

Extra dot in front of paths like 'path' and 'fallbackPath' are not necessary and may cause unexpected errors.

Hello,

the minified built version of pannellum.htm was not correct cause this space in the replace line was not replacing the corresponding line in src/pannellum.htm

        <link type="text/css" rel="Stylesheet" href="css/pannellum.css"/>