This is in response to Issue #832. The previous FXAA algorithm didn't
work particularly well unless applied to upsampled outputs. This
implements a slighltly more complex algorithm (same as molstar) that
looks better without upscaling.
Add an upscale viewer config option so user can configure level of
refinement.
BCIF is the default format for fetching from the pdb now. The secondary
structure annotations have changed, which necessitated regenerating all
reference images.
Also, added bfactor support to regular CIFs to address Issue #792
Ryan Guild preferred excessively elaborate file hierarchies. Since he
has abandoned the project we're going to go with what makes sense to me
(and is arguably more correct - 3dmol is the only true package, so why
factor it into a packages directory).
Clean up some other issues with typescript and imports.
