added plural rules again

gluon/contrib/plural_rules/uk.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+# -*- coding: utf8 -*-
+# Plural-Forms for uk (Ukrainian)
+
+nplurals=3 # Ukrainian language has 3 forms:
+           # 1 singular and 2 plurals
+
+# Determine plural_id for number *n* as sequence of positive
+# integers: 0,1,...
+# NOTE! For singular form ALWAYS return plural_id = 0
+get_plural_id = lambda n: (0 if n % 10 == 1 and n % 100 != 11 else
+                           1 if n % 10 >= 2 and n % 10 <= 4 and
+                               (n % 100 < 10 or n % 100 >= 20) else
+                           2)
+
+# construct_plural_form() is not used now because of complex
+# rules of Ukrainian language. Default version of
+# this function is used to simple insert new words into
+# plural_dict dictionary)
+# construct_plural_form = lambda word, plural_id: word
+