refs https://github.com/TryGhost/Team/issues/41, refs https://github.com/TryGhost/gscan/issues/85
- if you are using the pagination helper not inside a resource context, you will receive an error
- improve error message, because it was not clear what happened
- downgrade error level to normal, because it's not a critical error from Ghost's perspective, from user perspective it is
- added help docs link and added a callout to our docs
closes#9200
- Registered new server helper `{{reading_time}}`.
- Added new global util `word-count` based on the util in Ghost admin, which returns the number of words in an HTML string.
- Based on the word count of the post html, the helper calculated the estimated reading time:
- 275 words per minute
- additional 12 seconds when post has feature image
- Renders a string like 'x min red', unless reading time is less than a minute. In this case, the rendered string is '< 1 min read'.
refs #8995
- move the getClient lookup from ghost_head into middleware
- use res.locals to keep track of the information (res.locals.client)
- make the middleware global to all frontend routes
- ghost_head: get locals from options.data not this (!)
- adapt lot's of tests
