cleans up landing page (#541)

docs/_config.yml

@@ -2,6 +2,8 @@ theme: jekyll-theme-cayman
 show_downloads: false
 
 nav:
+  - title: Home
+    url: /
   - title: Data
     url: data.html
   - title: FAQ

docs/_layouts/default.html

@@ -20,7 +20,6 @@
     <link rel="stylesheet" href="{{ '/assets/css/style.css?v=' | append: site.github.build_revision | relative_url }}">
   </head>
   <body>
-    <a id="skip-to-content" href="#content">Skip to the content.</a>
 
     <header class="page-header" role="banner">
       <h1 class="project-name">{{ site.title | default: site.github.repository_name }}</h1>
@@ -31,7 +30,7 @@
         {% endfor %}
       {% endif %}
       {% if site.github.is_project_page %}
-        <a href="{{ site.github.repository_url }}" class="btn">Code</a>
+        <a href="{{ site.github.repository_url }}" class="btn" target="_blank">Code</a>
       {% endif %}
     </header>
 

docs/faq.md

@@ -48,6 +48,26 @@ We use a [Welch's _t_-test](https://en.wikipedia.org/wiki/Welch%27s_t-test) impl
 
 # Problems, errors, & bugs
 
+#### How do I create a Python 3.6 environment for _cellxgene_?
+
+If you use conda and want to create a [conda environment](https://conda.io/docs/user-guide/tasks/manage-environments.html) for _cellxgene_ you can use the following commands
+
+```
+conda create --yes -n cellxgene python=3.6
+conda activate cellxgene
+pip install cellxgene
+```
+
+Or you can create a virtual environment by using
+
+```
+ENV_NAME=cellxgene
+python3.6 -m venv ${ENV_NAME}
+source ${ENV_NAME}/bin/activate
+pip install cellxgene
+```
+
+
 #### In my _prepare_ command I received the following error `Warning: louvain module is not installed, no clusters will be calculated. To fix this please install cellxgene with the optional feature louvain enabled`
 
 Louvain clustering requires additional dependencies, so we don't include them by default. For now, you need to specify that you want these packages by using

docs/index.md

@@ -10,7 +10,7 @@ _cellxgene_ is an interactive data explorer for single-cell transcriptomics data
 
 ## getting started
 
-_cellxgene_ requires **Python 3.6**
+_cellxgene_ **only** supports Python 3.6. We recommend [installing _cellxgene_ into a conda or virtual environment.](/faq.html#how-do-i-create-a-python-36-environment-for-cellxgene)
 
 Install the package.
 ``` bash