Add reference as option for converting from Date

Author: avit

lib/ice_cube/time_util.rb

@@ -58,7 +58,7 @@ def self.match_zone(input_time, reference)
     end
 
     # Ensure that this is either nil, or a time
-    def self.ensure_time(time, date_eod = false)
+    def self.ensure_time(time, reference = nil, date_eod = false)
       case time
       when DateTime
         warn "IceCube: DateTime support is deprecated (please use Time) at: #{ caller[2] }"

lib/ice_cube/validations/until.rb

@@ -11,7 +11,7 @@ def until_time
     deprecated_alias :until_date, :until_time
 
     def until(time)
-      time = TimeUtil.ensure_time(time, true)
+      time = TimeUtil.ensure_time(time, nil, true)
       @until = time
       replace_validations_for(:until, time.nil? ? nil : [Validation.new(time)])
       self