Action-oriented TOC labels (#180)

* action-oriented TOC labels

* autobuilder

Author: mongoKart

source/style-guide/style/toc-labels.txt

@@ -113,3 +113,13 @@ TOC Labels
 - In technical documentation, TOC labels may use specialized technical 
   terminology and acronyms to accurately represent the content within 
   each section or page.
+
+- If a tutorial page uses an action-oriented TOC label, and that label fits on one line,
+  use the action-oriented label. Note that a child page can "inherit" an action from a 
+  parent page; for example, if the parent TOC label is "Query", you can label its child
+  pages "Arrays," "Nested Documents," etc., without repeating "Query" in the child labels.
+  
+  If an action-oriented TOC label doesn't fit on one line, use a shorter,
+  non-action-oriented label.
+
+  Don't use action-oriented TOC labels for reference pages.