Closes #75.
Also standardises the help template files. The principle I've adopted here is that English versions of all required help page templates should exist in alavetelitheme, with reasonably generic but full example content in them. https://github.com/mysociety/alaveteli/pull/3153 removes the duplicates and outdated text from Alaveteli core, and leaves stub template files that indicate that they should be overridden by the theme.
Quite a few points inline but they're all pretty minor so I'm going to 👍 and move it to "awaiting deploy". Feel free to bounce it back to me for a second look if you want to double-check before merging tho.
Closes #75. Also standardises the help template files. The principle I've adopted here is that English versions of all required help page templates should exist in alavetelitheme, with reasonably generic but full example content in them. https://github.com/mysociety/alaveteli/pull/3153 removes the duplicates and outdated text from Alaveteli core, and leaves stub template files that indicate that they should be overridden by the theme.