Add faq and more tweaks to advanced

docs/topics/faq.rst

@@ -0,0 +1,39 @@
+###
+FAQ
+###
+
+1. How can I perform some debug logging within a code block?
+
+   You can simply import the logging module within a code block. For example:
+
+    .. code-block:: yaml
+    :linenos:
+
+    tools:
+        default:
+        cores: 2
+        mem: cores * 3
+        rules:
+            - if: True
+              execute: |
+                import logging
+                log = logging.getLogger(__name__)
+                log.debug(f"Here's what the entity looks like: {entity}")
+
+2. How can I import custom libraries or code?
+
+   As long as the code is available within Galaxy's virtualenv or the python path,
+   it can be imported like any other package. For example:
+
+    .. code-block:: yaml
+    :linenos:
+
+    tools:
+        default:
+        cores: 2
+        mem: cores * 3
+        rules:
+            - if: True
+              execute: |
+                import my_custom_module
+                my_custom_module.my_func()