cleanup title attribute

social share: remove unneeded js

Remove Google+

Google+ is being shutdown on April 2, 2019. Social sharing buttong, comment provider, and author link configs have been removed from the theme.

ref: https://support.google.com/plus/answer/9195133

Upgrade Font Awesome to version 5 (#1446)

Upgrade Font Awesome to version 5 (SVG with JavaScript)

Close #1396

Merge branch 'master' of https://github.com/mmistakes/minimal-mistakes

Update social-share.html (#1357)

Merge branch 'rjkaes-escape-url-in-social-share'

URL Encode Title and Page URL in Social Share Links

The links to the various social networks include data from the post
(title and url) which can contain URL special characters.  Pass each of
the generated URLs through Liquid's `url_encode` filter to build HTML
complaint URLs.

Merge branch 'release/4.0.4'

Conflicts:
	README.md

Merge branch 'feature/theme-gem' into develop

Replace base_path with `absolute_url` filter where possible

Merge branch 'release/3.4.8'

includes: Enhance Twitter share link (#538)

* Include the page title before the URL
* If twitter.username is set, pass the `via` paramter for attribution

Merge branch 'release/3.3.5'

Add `en` default text to `site.locale` strings
- Close #407

Merge branch 'release/3.0.0'

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

Make base_path available to all includes that need it

Add LinkedIn social share button and add ARIA hidden to Font Awesome icons
- Close #174
- Close #179

Merge branch 'feature/visual-refresh' into develop