Renamed navbar since it is set by conf.py according to new theme

Made logo much smaller to comply with new theme

Added sample image for frong page

Modified conf.py for new bootstrap theme
toctree changed so that product pages are visible and all other pages hidden.  This allows products to be displayed in drop down menu.
Title added for python packages page
Changes to conf.py allowing products to be a dropdown menu containing all diffpy products.  Background of logo made transparent.
Revert to default values for the bootstrap theme.

And also do nitpicky error checking.
Define custom menu by replacing navbar.

Here is a new navbar adjusted from the bootstrap theme.
Extend rather than replace navbar.html.

This is so much better - only update navbar blocks that need change.
Use form-processing script on slapper.
Unify two static trees.

The static_root directory is for any static trees that will be copied
to the webpage root directory.