Addresses #963.
Supports two setups: getting profile text from page content.
```markdown
---
layout: about
title: about
permalink: /
subtitle: <a href='#'>Affiliations</a>. Address. Contacts. Moto. Etc.
profiles:
# if you want to include more than one profile, just replicate the following block
# and create one content file for each profile inside _pages/
- align: right
image: prof_pic.jpg
# content: about_einstein.md
image_circular: false # crops the image to make it circular
more_info: >
<p>555 your office number</p>
<p>123 your address street</p>
<p>Your City, State 12345</p>
news: true # includes a list of news items
selected_papers: true # includes a list of papers marked as "selected={true}"
social: true # includes social icons at the bottom of the page
---
Write your biography here. Tell the world about yourself. Link to your favorite [subreddit](http://reddit.com). You can put a picture in, too. The code is already in, just name your picture `prof_pic.jpg` and put it in the `img/` folder.
Put your address / P.O. box / other info right below your picture. You can also disable any these elements by editing `profile` property of the YAML header of your `_pages/about.md`. Edit `_bibliography/papers.bib` and Jekyll will render your [publications page](/al-folio/publications/) automatically.
Link to your social media connections, too. This theme is set up to use [Font Awesome icons](http://fortawesome.github.io/Font-Awesome/) and [Academicons](https://jpswalsh.github.io/academicons/), like the ones below. Add your Facebook, Twitter, LinkedIn, Google Scholar, or just disable all of them.
```
Or getting profile text from `content` (useful when having multiple
profiles).
```markdown
---
layout: about
title: about
permalink: /
subtitle: <a href='#'>Affiliations</a>. Address. Contacts. Moto. Etc.
profiles:
# if you want to include more than one profile, just replicate the following block
# and create one content file for each profile inside _pages/
- align: right
image: prof_pic.jpg
content: about_einstein.md
image_circular: false # crops the image to make it circular
more_info: >
<p>555 your office number</p>
<p>123 your address street</p>
<p>Your City, State 12345</p>
- align: left
image: prof_pic.jpg
content: about_einstein.md
image_circular: false # crops the image to make it circular
more_info: >
<p>555 your office number</p>
<p>123 your address street</p>
<p>Your City, State 12345</p>
news: true # includes a list of news items
selected_papers: true # includes a list of papers marked as "selected={true}"
social: true # includes social icons at the bottom of the page
---
```
Which looks like this:

---------
Signed-off-by: George Araújo <george.gcac@gmail.com>
Signed-off-by: George Araujo <george.gcac@gmail.com>
Addressing #1395 but with a different solution from #1478, using
semantic versioning based on implementation found
[here](https://distresssignal.org/busting-css-cache-with-jekyll-md5-hash).
Implemented a way of calculating the hash for both a single file or
directory. This way we can calculate the hash for when there is a change
in the `_sass` dir, for example, or in the contents of a single file.
Examples of generated outputs of the plugin:
```
/al-folio/assets/css/main.css?d41d8cd98f00b204e9800998ecf8427e
/al-folio/assets/js/theme.js?96d6b3e1c3604aca8b6134c7afdd5db6
/al-folio/assets/js/dark_mode.js?9b17307bb950ffa2e34be0227f53558f
/al-folio/assets/js/no_defer.js?d633890033921b33e0ceb13d22340a9c
/al-folio/assets/js/common.js?acdb9690d7641b2f8d40529018c71a01
/al-folio/assets/js/copy_code.js?c9d9dd48933de3831b3ee5ec9c209cac
/al-folio/assets/img/prof_pic.jpg?974957d202f671e4fa6700c04e68deae
```
Signed-off-by: George Araujo <george.gcac@gmail.com>
fixes#993
Also added links to news and publications from respective section
headers on the home page. Changed the colors of the header links to make
it consistent with the previous look.
This PR replaces the jekyll-responsive-images with jekyll-imagemagick for responsive WebP images.
WebP images are much smaller compared to PNG and JPEG, faster to load and most of the modern browsers recommend it.
More information about WebP images: https://developers.google.com/speed/webp