Fixed website to work with Jekyll less than 4.0 and ruby 2.6

Gemfile

@@ -10,7 +10,7 @@ source "https://rubygems.org"
 # Happy Jekylling!
 
 
-gem "jekyll", "3.7.4"
+gem "jekyll", "< 4.0"
 
 # If you have any plugins, put them here!
 group :jekyll_plugins do
@@ -20,15 +20,16 @@ group :jekyll_plugins do
   gem "jekyll-feed"
   gem "jekyll-paginate"
   gem "jekyll-contentblocks"
-  gem "jekyll-assets", "2.4.0"
+  gem "jekyll-assets"
   gem 'jekyll-font-awesome-sass'
+  gem "sprockets", "~> 3.7"
+  gem "kramdown-parser-gfm"
   gem 'remark'
   gem 'jekyll-mermaid'
   gem 'uglifier'
   gem 'therubyracer'
 end
 
-
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem "tzinfo-data", platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 

README.md

@@ -31,6 +31,6 @@ To use this website, the following steps are necessary:
 
 # Basic use:
 
-rvm use ruby 2.4
+rvm use ruby 2.6
 bundle exec jekyll build
 bundle exec jekyll serve  &

_config.yml

@@ -38,6 +38,9 @@ reveal_theme: black.css
 markdown: kramdown
 theme: jekyll-theme-cayman
 
+gems:
+  - jekyll-font-awesome-sass
+
 plugins:
   - jekyll-feed
   - jekyll-seo-tag

_posts/2018-07-26-welcome-to-jekyll.markdown

----
-layout: post
-title:  "Welcome to Jekyll!"
-date:   2018-07-26 23:02:57 -0700
-categories: jekyll update
----
-You’ll find this post in your `_posts` directory. Go ahead and edit it and re-build the site to see your changes. You can rebuild the site in many different ways, but the most common way is to run `jekyll serve`, which launches a web server and auto-regenerates your site when a file is updated.
-
-To add new posts, simply add a file in the `_posts` directory that follows the convention `YYYY-MM-DD-name-of-post.ext` and includes the necessary front matter. Take a look at the source for this post to get an idea about how it works.
-
-Jekyll also offers powerful support for code snippets:
-
-{% highlight ruby %}
-def print_hi(name)
-  puts "Hi, #{name}"
-end
-print_hi('Tom')
-#=> prints 'Hi, Tom' to STDOUT.
-{% endhighlight %}
-
-Check out the [Jekyll docs][jekyll-docs] for more info on how to get the most out of Jekyll. File all bugs/feature requests at [Jekyll’s GitHub repo][jekyll-gh]. If you have questions, you can ask them on [Jekyll Talk][jekyll-talk].
-
-[jekyll-docs]: https://jekyllrb.com/docs/home
-[jekyll-gh]:   https://github.com/jekyll/jekyll
-[jekyll-talk]: https://talk.jekyllrb.com/

_scss/fontawesome.scss

-/*!
- * Font Awesome Free 5.3.1 by @fontawesome - https://fontawesome.com
- * License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License)
- */
-@import 'variables';
-@import 'mixins';
-@import 'core';
-@import 'larger';
-@import 'fixed-width';
-@import 'list';
-@import 'bordered-pulled';
-@import 'animated';
-@import 'rotated-flipped';
-@import 'stacked';
-@import 'icons';
-@import 'screen-reader';

assets/css/my-remark.scss

 ---
 # This is the custom style sheet for remark
 ---
-@import "fontawesome";
+$fa-font-path: "../fonts/font-awesome/";
+@import 'font-awesome.min.css';
 @import "remark-base";
 $body-font: 24pt;
 $code-font: 20pt;

assets/css/site.scss

@@ -4,8 +4,7 @@
 @charset "utf-8";
 
 $fa-font-path: "../fonts/font-awesome/";
-
-@import "fontawesome";
+@import 'font-awesome.min.css';
 @import "{{site.theme}}";
 
 $font-size-base: 1rem;

assets/css/style.css

-.main-content h1, .main-content h2, .main-content h3, .main-content h4, .main-content h5, .main-content h6 {
-  color: #363C74;
-}
-
-.caption-frame {
-    position: top;
-    float: top;
-    width: 100%;
-    height: 200px;
-}
-
-.marknav { text-align: left; }
-.marknav a { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
-.marknav a:focus, .marknav a:active { position: static; left: 0; width: auto; height: auto; overflow: visible; text-decoration: underline; }
-
-
-ul#markdown-toc {
-    min-width: 696px;
-    list-style: none;
-    padding-top: 20px;
-}
-
-ul#markdown-toc li{
-    display: inline;
-    padding: 5px;
-    background-color: #e9ecef;
-    style: bold;
-}
-
-ul li.tbd {
-    color: red;
-}
-
-h1.tbd {
-    background-image: linear-gradient(to left, #bdd5ea, #363c74);
-    color: lightcoral;
-    padding: 5px;
-}
-
-p.tbd #tbd{
-    color: red;
-}
-
-dl dd.tbd {
-    color: #660000;
-}
-
-h1.week{
-    background-image:  linear-gradient(to left, #bdd5ea, #363c74);
-    color: white;
-    padding:5px;
-}
-
-dl dt.lecture {
-    style:bold;
-    font-size: large;
-    background-color:  #E3E9F9;
-    padding:5px;
-}
-
-dl dt.holiday {
-    style:bold;
-    font-size: large;
-    background-color:  #363C74;
-    color:  #E3E9F9;
-    padding:5px;
-}
-
-dl dt.cancelled {
-    style:bold;
-    font-size: large;
-    background-color:  red;
-    color:  #E3E9F9;
-    padding:5px;
-}
-
-dl dt.lab {
-    style:bold;
-    font-size: large;
-    background-color: #EBF9E8;
-    padding:5px;
-}
-
-.navbar {
-    background-color:  #363C74;
-}
-
-table.schedule {
-  border: 2px solid #FFFFFF;
-  width: 100%;
-  text-align: left;
-  table-layout:fixed;
-  border-collapse: collapse;
-}
-
-
-#unpublished-warning {
-   background-color: #ffe6e6;
-   border: 0.15em solid red;
-   border-radius: 0.5em;
-   color: red;
-   font-size: large;
-   padding: 0.25em 0.5em;
-   margin-bottom: 1em;
-}
-
-table.schedule td, table.schedule th {
-  border: 1px solid #FFFFFF;
-  padding: 3px 4px;
-}
-
-table.tbd td, table.tbd th{
-  background-color: #ffe6e6;
-  border: 2px solid white;
-  padding: 3px 4px;
-}
-
-table.schedule tbody td,table.tbd tbody td {
-  font-size: 13px;
-}
-
-
-table.schedule td:nth-child(even) {
-  background: #EBEBEB;
-}
-table.tbd td:nth-child(even) {
-  background: #ffffe6;
-}
-
-table.schedule thead {
-  background: #FFFFFF;
-  border-bottom: 4px solid #333333;
-}
-table.schedule thead th {
-  font-size: 15px;
-  font-weight: bold;
-  color: #333333;
-  text-align: ;
-  border-left: 2px solid #333333;
-}
-table.schedule thead th:first-child {
-  border-left: none;
-}
-
-table.schedule tfoot {
-  font-size: 14px;
-  font-weight: bold;
-  color: #333333;
-  border-top: 4px solid #333333;
-}
-table.schedule tfoot td {
-  font-size: 14px;
-}
-
-.page-header {
-  background-image: linear-gradient(-120deg, #bdd5ea, #363c74);
-  padding-top: 1rem;
-}
-
-.project-tagline {
-  padding-bottom: 1rem;
-  margin-bottom: 1rem;
-}
-
-img.ta-picture {
-  height: 80px;
-  max-width: unset;
-  margin-left: auto;
-  margin-right: auto;
-  display: block;
-}
-
-.font-14pt {
-    font-size: 12pt;
-}