fixed webrat/core/methods to recognise singular verbs

lib/webrat/core/methods.rb

@@ -23,19 +23,19 @@ module Webrat
       :within,
       :header, :http_accept, :basic_auth,
       :save_and_open_page,
-      :fill_in,
-      :check, 
-      :uncheck,
-      :choose,
-      :select,
-      :attach_file,
+      :fills_in, :fill_in,
+      :checks, :check, 
+      :unchecks, :uncheck,
+      :chooses, :choose,
+      :selects, :select,
+      :attaches_file, :attach_file,
       :cookies,
       :response,
       :current_page,
       :current_url,
-      :click_link,
-      :click_area,
-      :click_button,
+      :clicks_link, :click_link,
+      :clicks_area, :click_area,
+      :clicks_button, :click_button,
       :reload, :reloads,
       :clicks_link_within,
       :field_labeled