Added PRIME applets

.gitmodules

@@ -54,3 +54,7 @@
 	path = book/external/sphinx-iframes
 	url = https://github.com/TeachBooks/sphinx-iframes.git
 	branch = manual
+[submodule "book/external/Sphinx-PRIME-applets"]
+	path = book/external/Sphinx-PRIME-applets
+	url = https://github.com/TeachBooks/Sphinx-PRIME-applets.git
+	branch = manual

book/_config.yml

@@ -22,6 +22,7 @@ sphinx:
   - sphinx_proof
   - sphinx_named_colors
   - sphinx_iframes
+  - sphinx_prime_applets
   config:
     html_js_files:
     - https://cdnjs.cloudflare.com/ajax/libs/require.js/2.3.4/require.min.js

book/_toc.yml

@@ -77,6 +77,7 @@ parts:
         - file: features/widgets.ipynb
         - file: features/exercise_checking.ipynb
       - file: external/sphinx-iframes/README.md
+      - file: external/Sphinx-PRIME-applets/README.md
     - file: features/visuals.md
       sections:
       - file: external/Sphinx-Image-Inverter/README.md

book/external/Sphinx-PRIME-applets

@@ -0,0 +1 @@
+Subproject commit 43ea44ccdc917234513fcd0ea1b9d5159a7dc81f

requirements.txt

@@ -7,7 +7,8 @@ sphinx-image-inverter == 1.1.2
 sphinx-exercise == 1.0.1
 sphinx-proof == 0.2.0
 sphinx-named-colors == 1.0.1
-sphinx-iframes
+sphinx-iframes == 1.0.1
+sphinx-prime-applets == 1.0.1
 
 git+https://github.com/TeachBooks/Sphinx-Thebe