Move README and OWNERS into project root directory

Change-Id: Ic8b7e49a860830243ee474d514cd655f52fb0537
diff --git a/buffet/OWNERS b/OWNERS
similarity index 100%
rename from buffet/OWNERS
rename to OWNERS
diff --git a/buffet/README b/README
similarity index 100%
rename from buffet/README
rename to README