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

css/customstyles.css

@@ -84,6 +84,9 @@ details[open] summary {
 .bs-callout-warning h4 {
     color: #f0ad4e;
 }
+.bs-callout-warning .text-warning {
+    color: #f0ad4e;
+}
 .bs-callout-info {
     border-left-color: #5bc0de;
 }