Merge pull request #1311 from mathbunnyru/asalikhov/docs_cleanup

Cleanup docs: new svg icon, remove old files, fix pygments lexer warning

Author: consideRatio

docs/_static/jupyter-logo.png

@@ -96,7 +96,7 @@
     'github_user': 'jupyter',
     'github_repo': 'docker-stacks',
     'github_type': 'star',
-    'logo': 'jupyter-logo.png',
+    'logo': 'jupyter-logo.svg',
     'logo_text_align': 'left'
 }
 

docs/_static/jupyter-logo.svg

@@ -34,28 +34,28 @@ cookiecutter https://github.com/jupyter/cookiecutter-docker-stacks.git
 Enter a name for your new stack image. This will serve as both the git repository name and the part
 of the Docker image name after the slash.
 
-```lang-none
+```text
 stack_name [my-jupyter-stack]:
 ```
 
 Enter the user or organization name under which this stack will reside on Docker Hub. You
 must have access to manage this Docker Hub organization to push images here and set up automated
 builds.
 
-```lang-none
+```text
 stack_org [my-project]:
 ```
 
 Select an image from the jupyter/docker-stacks project that will serve as the base for your new
 image.
 
-```lang-none
+```text
 stack_base_image [jupyter/base-notebook]:
 ```
 
 Enter a longer description of the stack for your README.
 
-```lang-none
+```text
 stack_description [my-jupyter-stack is a community maintained Jupyter Docker Stack image]:
 ```