Setup basic Runtime with properties and platform.

recipe_engine/doc.py

Index: recipe_engine/doc.py
diff --git a/recipe_engine/doc.py b/recipe_engine/doc.py
index 24ddc7e0c41a047b7cc15e1bdecffcff9bd6eab7..ade8ae334a0038c06a34b2701d71b3c0ed149145 100644
--- a/recipe_engine/doc.py
+++ b/recipe_engine/doc.py
@@ -99,8 +99,9 @@ def main(universe_view):
   for module_name in universe_view.loop_over_recipe_modules():
     deps[module_name] = universe.load(universe_view.package, module_name)
 
+  rt = recipe_run.Runtime({})
   inst = loader.create_recipe_api(
-      deps, recipe_run.RecipeEngine(None, {}, universe))
+      deps, recipe_run.RecipeEngine(None, rt, universe))
 
   for mod_name, mod in sorted(deps.iteritems(), key=lambda it: it[0]):
     p(0)