Added FriendlyHash for orders, refactored Order#execute arguments

lib/friendly_hash.rb

@@ -0,0 +1,23 @@
+class IMICRTS
+  class FriendlyHash
+    def initialize
+      @hash = {}
+    end
+
+    def [](key)
+      @hash[key.to_sym]
+    end
+
+    def []=(key, value)
+      @hash[key.to_sym] = value
+    end
+
+    def method_missing(method)
+      if value = @hash.dig(method)
+        value
+      else
+        raise "Unknown value for: #{method}"
+      end
+    end
+  end
+end