Allow no repository, fix broken md files

Author: meiamsome

_CodingChallenges/003-snake-game-p5.md

@@ -15,7 +15,7 @@ contributions:
     author:
       name: "Bob Voorneveld"
       url: https://www.bobvoorneveld.nl
-    source: https://github.com/bobvoorneveld/Coding-Challenges/tree/master/CC003-The%20Snake%20Game"
+    source: "https://github.com/bobvoorneveld/Coding-Challenges/tree/master/CC003-The%20Snake%20Game"
 
   - title: "Snake Game"
     author:

_CodingChallenges/012-lorenzattractor.md

@@ -13,7 +13,7 @@ links:
   - title: "Lorenz System on Wikipedia"
     url: "https://en.wikipedia.org/wiki/Lorenz_system"
   - title: "Lorenz Attractor"
-    url: http://paulbourke.net/fractals/lorenz/"
+    url: "http://paulbourke.net/fractals/lorenz/"
     author: "Paul Bourke"
   - title: "beginShape() reference"
     url: "https://processing.org/reference/beginShape_.html"

_CodingChallenges/017-spacecolonizer.md

@@ -4,7 +4,8 @@ redirect_from: CodingChallenges/17-spacecolonizer.html
 video_number: 17
 date: 2016-06-01
 video_id: kKT0v3qhIQY
-repository: /CC_017_SpaceColonizer
+repository: CC_017_SpaceColonizer
+live_example: CC_017_SpaceColonizer_p5
 links:
   - title: "Algorithmic Botany"
     url: "http://algorithmicbotany.org/"

_CodingChallenges/032.2-agario-sockets.md

@@ -5,6 +5,7 @@ video_number: 32.2
 date: 2016-09-04
 video_id: ZjVyKXp9hec
 repository: /CC_032.2_agario_sockets
+live_example: false
 links:
   - title: "Agar.io"
     url: "http://agar.io"

_CodingChallenges/041-clappy-bird.md

@@ -4,7 +4,7 @@ redirect_from: CodingChallenges/41-clappy-bird.html
 video_number: 41
 date: 2016-08-20
 video_id: aKiyCeIuwn4
-repository: CC_41_ClappyBird
+repository: CC_041_ClappyBird_p5.js
 
 links:
   - title: "p5.js sound library reference"

_CodingChallenges/090-floyd-steinberg-dithering.md

@@ -4,8 +4,8 @@ redirect_from: CodingChallenges/90-floyd-steinberg-dithering.html
 video_number: 90
 date: 2018-01-16
 video_id: 0L2n8Tg2FwI
-repository: /CC_090_dithering
-
+repository: CC_090_dithering
+live_example: CC_090_dithering_p5.js
 links:
   - title: "Stippling"
     url: "http://roberthodgin.com/portfolio/stippling/"

_jekyll/layouts/video.html

@@ -55,8 +55,8 @@
         {% capture live_example_url %}/{{ page.collection }}/{{ page.live_example | default: page.repository }}{% endcapture %}
 
         <div class="code-actions">
-          <a href="{{ site.github_download_prefix | append: site.github.repository_url | append: '/tree/' | append: site.github.source.branch | append: '/' | append: page.collection | append: page.repository }}" target="blank">Get the Code</a>
-          <a href="{{ live_example_url | relative_url }}" target="blank" class="{% if page.live_example == false %}disabled{% endif %}">Live Example</a>
+          <a href="{% if page.repository == false %}#{% else %}{{ site.github_download_prefix | append: site.github.repository_url | append: '/tree/' | append: site.github.source.branch | append: '/' | append: page.collection | append: '/' | append: page.repository }}{% endif %}" target="blank" class="{% if page.repository == false %}disabled{% endif %}">Get the Code</a>
+          <a href="{% if page.live_example == false %}#{% else %}{{ live_example_url | relative_url }}{% endif %}" target="blank" class="{% if page.live_example == false %}disabled{% endif %}">Live Example</a>
         </div>
 
       {% endif %}