Initial documentation structure

Change-Id: I73ac43b89327ea5784511befd36df25ed5048399
diff --git a/specification/hardware.rst b/specification/hardware.rst
new file mode 100644
index 0000000..d152cf3
--- /dev/null
+++ b/specification/hardware.rst
@@ -0,0 +1,2 @@
+Supported Hardware
+==================