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

Update CHANGELOG and history

Remove comments in dev environment (#1363)

Remove analytics in dev environment (#1362)

Update CHANGELOG and history

Rename Naver verification to `naver_site_verification`

Replace hyphens with underscores to be consistent with other site variable names.

Remove Alexa.com verification

Alexa "[Claim Your Site](https://support.alexa.com/hc/en-us/articles/219135887)" feature has been retired.

Close #1350

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

Update CHANGELOG and history

Update social-share.html (#1357)

Update CHANGELOG and history

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

Fix lunar-en.js layout (#1356)

Without layout set to null a HTML template will be rendered around the
JavaScript, causing an error while loading the file in the browser.

Update CHANGELOG and history

:wrench: mistake in excerpt (#1354)

Release 4.7.1 :gem:

Refine search styling

Replace hardcoded text with strings stored in `_data` file

Add search layout documentation

Add Lunr Search (#1353)

* Add `search.html` layout and JavaScript
* Move `{{ content }}` before search input
* Add spaces for consistency

Close #1011