Documentation update 2

Created by: Dhruva-Storz

A few fixes to website, a few additions

docs/source/user/py/cookbook/chem_load_save.rst

@@ -2,6 +2,35 @@
 Load - Run - Save models
 ************************
 
+.. hidden-code-block:: reStructuredText
+   :label: How to run these examples
+
+   Each of the following examples can be run by clicking on the green source button
+   on the right side of each example, and running from within a ``.py`` python file
+   on a computer where moose is installed.
+
+   Alternatively, all the files mentioned on this page can be found in the main
+   moose directory. They can be found under 
+
+       (...)/moose/moose-examples/snippets
+
+   They can be run by typing 
+
+       $ python filename.py
+
+   in your command line, where filename.py is the python file you want to run.
+
+   All of the following examples show one or more methods within each python file.
+   For example, in the ``cubeMeshSigNeur`` section, there are two blue tabs
+   describing the ``cubeMeshSigNeur.createSquid()`` and ``cubeMeshSigNeur.main()``
+   methods.
+
+   The filename is the bit that comes before the ``.`` in the blue boxes, with
+   ``.py`` added at the end of it. In this case, the file name would be
+   ``cubeMeshSigNeur.py``.
+|
+
+
 Load a Kinetic Model
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