Update changelog and readme [ci skip]

CHANGELOG.rdoc

@@ -10,6 +10,7 @@
   * Support for `pattern` on text field inferred from validation when :pattern is true
   * Break Text, Password and File into their own inputs
   * Support easy enabling and disabling of components for specific inputs
+  * Add HTML5 range input
 
 * bug fix
   * Fix bug when simple_fields_for is used with a hash like models and Rails 3.1

README.rdoc

@@ -311,6 +311,7 @@ SimpleForm comes with a lot of default mappings:
   integer               number field            integer
   float                 number field            float
   decimal               number field            decimal
+  range                 range field             -
   datetime              datetime select         datetime/timestamp
   date                  date select             date
   time                  time select             time