We now allow server operators to customize the /r/ part of the channel links
The new config option in the template is commented and the config module validates and will terminate with status 78 if an improper value is used.
We've also dropped some old cruft and uses a more elegant method to assign CHANNEL.name
Resolves#668
1.) module dependency updated from jade 1.11.0 to pug 2.0.0-beta3
2.) All references to Jade have been changed to Pug
3.) /srv/web/jade.js is renamed to pug.js
4.) all template files renamed accordingly
5.) "mixin somename" is automatically considered a declaration, invocations must use "+somename"
6.) variable interpolation is no longer supported inside element attributes, use direct references and string concatenation instead.
7.) bumped minor version
