Fix #6: automatic section numbering.

Add chapter number to YAML, which is replace in numbering.css.
Use CSS counters for chapters, sections, subsections | examples.
Examples are detected by looking at the H3 element's id,
which redcarpet derives from the heading's title.
It must start with "Example:", and the whole title is suppressed
by a little javascript, so we can make Examples look like in the pdf.

For example, `### Example:` becomes `Example 3.2.10`,
if it's the 10th example in Section 3.2.

1 files changed, 3 insertions, 2 deletions

diff --git a/09-implicit-parameters-and-views.md b/09-implicit-parameters-and-views.md
index b55109636a..8cd54897c9 100644
--- a/09-implicit-parameters-and-views.md
+++ b/09-implicit-parameters-and-views.md
@@ -1,6 +1,7 @@
 ---
 title: Implicit Parameters and Views
 layout: default
+chapter: 7
 ---
 
 # Implicit Parameters and Views
@@ -18,7 +19,7 @@ and can be used as implicit conversions called [views](#views).
 The `implicit` modifier is illegal for all
 type members, as well as for [top-level objects](11-top-level-definitions.html#packagings).
 
-###### Example: `Monoid`
+### Example:
 The following code defines an abstract class of monoids and
 two concrete implementations, `StringMonoid` and
 `IntMonoid`. The two implementations are marked implicit.
@@ -289,7 +290,7 @@ As for implicit parameters, overloading resolution is applied
 if there are several possible candidates (of either the call-by-value
 or the call-by-name category).
 
-###### Example: `Ordered`
+### Example:
 Class `scala.Ordered[A]` contains a method
 
 ```