Added the start of a Rate History table in the Rate partial

* Had to do Model level access in the view.  Once there is a hook in the
  controller, it can be moved to there.
* Added a table listing each rate using the memberships table as a base

  #1915

lang/en.yml

@@ -1,2 +1,3 @@
 # English strings go here
 rate_label_rates: Rates
+rate_label_rate: Rate