Add Python page

- Update styles for some includes
- Use default markdown rendering instead of span rendering to allow
  multi-line content
- Slight hack in customstyles to allow color overrides. A better fix
  would be to use the bootstrap sass to keep constant colors throughout
  the project
- Added title parameter to note and warning includes

_data/sidebars/merlin6_sidebar.yml

@@ -55,7 +55,7 @@ entries:
       url: /merlin6/slurm-examples.html
     - title: Slurm Configuration
       url: /merlin6/slurm-configuration.html
-    - title: Monitoring 
+    - title: Monitoring
       url: /merlin6/monitoring.html
   - title: Jupyterhub
     folderitems:
@@ -77,6 +77,8 @@ entries:
       url: /merlin6/openmpi.html
     - title: IntelMPI
       url: /merlin6/impi.html
+    - title: Python
+      url: /merlin6/python.html
     - title: ANSYS/CFX
       url: /merlin6/ansys-cfx.html
     - title: ANSYS/Fluent