Fixes #149

via PR #134 @looer

Added config variable so this doesn't show up

Show "reading time" and "word count" but only if one of the following are true:
1) A global config `params` value is set `show_reading_time = true`
 2) A section front matter value is set `show_reading_time = true`
3) A page front matter value is set `show_reading_time = true`

Fixes #115

2.0 Enhancements

- Improve template structure
- Fixed issue where flexbox was configured improperly and the side column expanded with longer content.
- No longer assume that posts are called "post"
- Simplify tag handling
- Improve related posts handling
- Support native Table of contents (if declared in params)
- Add DISQUS commenting (if disqusShortname added to config)
- Uses Hugo's Related content feature 
- Add asset hashing to Webpack for performance