(GH-1932) Add config.wyam

To control the inclusion of 2nd level headers in the "Edit Content"
section of the docs pages.

Author: gep13

.gitignore

@@ -124,3 +124,8 @@ src/GitVersionRubyGem/bin/LibGit2Sharp.dll.config
 
 !**/*.cake
 .DS_Store
+
+# Wyam
+config.wyam.dll
+config.wyam.hash
+config.wyam.packages.xml

config.wyam

@@ -0,0 +1 @@
+Pipelines["RenderPages"].Replace("WriteMetadata", new Headings(2));