Merge branch 'release/3.2.0'

Merge branch 'feature/update-dependencies' into develop

Rename tag/category archive variables to avoid possible conflicts with site.tags and site.categories
- Fixes #329

Merge branch 'release/3.0.0'

Merge branch 'feature/documentation-and-demo' into develop

Make base_path available to all includes that need it

Merge branch 'feature/visual-refresh' into develop

Make sure breadcrumbs, tag lists, and category lists only display when enabled

Add support for Jekyll Archives plugin
- Option to select GitHub Pages compatible tag/category page archive or plugin generated archives

Edit sidebar and page meta styles

Properly detect if a page has tags or categories
- Arrays are truthy, test on first item instead

Add page taxonomy links for tags and categories
- Customizable text via _data file
- Enable/disable links by setting archive page filenames in _config.yml

Add file extensions back to non-helper _includes