Try upgrading sphinx and sphinx-book-theme

[davisagli]

@stevepiercy Tried this locally. It installs but I'm getting errors while building the docs, so I'll push it here to make it easier to take a look.

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[davisagli]

@stevepiercy It looks like there were some updates to the theme templates that went along with upgrading the theme in plone/training#757. I haven't had time to look at the details yet.

[stevepiercy]

@davisagli I'm putting this off until I can release https://github.com/plone/plone-sphinx-theme. There are too many things that need to be copied over from Training to make this work for all the docs.

[davisagli]

@stevepiercy oh, phooey, I didn't know about that, and I've been working on copying things from training for the past hour or two

[davisagli]

@stevepiercy I pushed what I got to... probably some of this should go in plone-sphinx-theme instead. Things seem to be generally working, but the search results still need some style love.