Update docs

Add Bitbucket link to author sidebar
- Close #256

Add optional location to author sidebar

Update syntax highlighting styles

Add screenshots of various layouts included with the theme

Update docs

Add /docs/ redirect to Quick-Start Guide

Add development config file

Update Navigation docs

Update Configuration docs

Re-order settings

Update docs

Re-order settings

Increase white-space between headings

Remove site.share conditional

Update docs

Reorder config and remove some variables

Remove site.read_time condition

Allow breadcrumbs to be enabled with non-Jekyll Archives plugin

Bump up text contrast to improve readability