Zacchaeus

The mobile preview doesn't scroll in firefox, but it does in chrome E.g.: http://www.bootply.com/bhIj8txbau  Tested in Firefox version 31.0 & 32.0, Chrome 37.0.2062.120

Update deprecated xelatex and lualatex commands

4

Fixes #18 #14 #19

The [Using Widgets](https://docs.bolt.cm/3.3/templating/widgets#other-functionality) page has two different snippets for the `countwidgets` function, which give conflicting information. The first says _'Note that this function also requires the 'zone' parameter, which is...