Migrating wiki contents from Google Code

RepositoryGuide.md

@@ -0,0 +1,34 @@
+`yaml-cpp` naturally splits into a "core" library with two "frontend" APIs, and so that's how the code is organized.
+
+## Core ##
+
+```
+hg clone https://code.google.com/p/yaml-cpp.core/
+```
+
+This provides parsing to the intermediate (and undocumented!) event API, as well as emitting.
+
+## New API ##
+
+```
+hg clone https://code.google.com/p/yaml-cpp.new-api/
+```
+
+This is an upstream of the `core` repository. It provides the new `YAML::Node` API. See [Tutorial](Tutorial.md) for details on this API.
+
+## Old API ##
+
+```
+hg clone https://code.google.com/p/yaml-cpp.old-api/
+```
+
+This is an upstream of the `core` repository. It provides the old `YAML::Node` API. See [HowToParseADocument](HowToParseADocument.md) for details on this API.
+
+## Default ##
+
+
+```
+hg clone https://code.google.com/p/yaml-cpp/
+```
+
+This is a mirror of the `new-api` repository.