Flow docs (#1432)

* Flow guide by example

* Consistent chapter naming and ordering in docs
* Make "supervision" a subsection of "Exception Handling" chapter
* Knit: filter out sampleStart/End from Knit-generated source files
* Knit: Support example auto-numbering
diff --git a/docs/composing-suspending-functions.md b/docs/composing-suspending-functions.md
index a910f49..0cd0276 100644
--- a/docs/composing-suspending-functions.md
+++ b/docs/composing-suspending-functions.md
@@ -20,7 +20,7 @@
 
 <!--- TOC -->
 
-* [Composing suspending functions](#composing-suspending-functions)
+* [Composing Suspending Functions](#composing-suspending-functions)
   * [Sequential by default](#sequential-by-default)
   * [Concurrent using async](#concurrent-using-async)
   * [Lazily started async](#lazily-started-async)
@@ -29,7 +29,7 @@
 
 <!--- END_TOC -->
 
-## Composing suspending functions
+## Composing Suspending Functions
 
 This section covers various approaches to composition of suspending functions.