get popouts working for data definitions; get our few other popouts working, through a tspreadsheet
also add toy popout macro
remove unnecessary params to popover
Merge branch 'popouts' of github.com:bepetersn/cook-convictions into bepetersn-popouts

@bepetersn originally put the popout macro (good idea!) in
``slides/_popout.md``.  I moved this to the more clearly named
``macros/_popout.html``.

I also removed reassigning ``$`` to ``old_jquery`` in the scripts
at the bottom of index.html because I couldn't see the purpose of
this and things seemed to work without doing it.

Conflicts:
	slides/about-data.md