Add docs directory and skeleton documents for v1

docs/README.md

@@ -0,0 +1,10 @@
+## service-catalog docs
+
+This directory contains documentation for versions of the service-catalog:
+
+1.  Use-cases
+2.  Architecture summary documents
+
+Each version will get its own subdirectory.  Each version's documentation
+should be a complete accounting of supported use-cases, architecture, etc for
+that version.

docs/v1/README.md

@@ -0,0 +1,7 @@
+## service-catalog v1 docs
+
+This directory contains design documents for the v1 version of `service-
+catalog`:
+
+- [Use cases](./use-cases.md)
+- [Architecture](./architecture.md)

docs/v1/use-cases.md

@@ -0,0 +1,9 @@
+## service-catalog v1 use cases
+
+This document contains the complete list of accepted use-cases for the v1 version of `service-catalog`.
+
+## Use Cases
+
+The v1 service-catalog supports the following use cases:
+
+1. <TBD>