Interation methods #each, #map_each and more are

implemented and working. Also restructured files
again.

lib/time_ext/method_chain.rb

@@ -0,0 +1,18 @@
+module TimeExt
+  module MethodChain
+    
+    def add_to_chain(method, *args, &block)
+      @method_chain ||= []
+      @method_chain << [method.to_sym, args, block]
+    end
+    
+    def call_chain(custom_block = nil, &block)
+      method, args, iblock = @method_chain.pop
+      return nil if method.nil?
+      iblock = custom_block if !custom_block.nil?
+      method, args, iblock = yield(method, args, iblock) if block_given?
+      self.send(method, *args, &iblock)
+    end
+    
+  end
+end