Merge branch 'conda-common' into 'master'

Add anaconda common nav link.

See merge request !292

content/applications/user_software/using_anaconda_package_manager.md

@@ -19,6 +19,7 @@ straightforward.
 - [Using Anaconda](#using-anaconda)
 - [Searching for Packages](#searching-for-packages)
 - [Creating custom Anaconda Environments](#creating-custom-anaconda-environments)
+- [Using /common for environments](#using-common-for-environments)
 - [Adding and Removing Packages from an Existing Environment](#adding-and-removing-packages-from-an-existing-environment)
 - [Creating custom GPU Anaconda Environment](#creating-custom-gpu-anaconda-environment)
 - [Using an Anaconda Environment in a Jupyter Notebook on Crane](#using-an-anaconda-environment-in-a-jupyter-notebook-on-crane)