* Upd tokenizer with i.e. tests

tests/test_tokenizer.py

@@ -119,6 +119,13 @@ def test_bracket_period(EN):
     tokens = EN(text)
     assert tokens[len(tokens) - 1].orth_ == u'.'
 
+
+def test_ie(EN):
+    text = u"It's mediocre i.e. bad."
+    tokens = EN(text)
+    assert len(tokens) == 6
+    assert tokens[3].orth_ == "i.e."
+
 #def test_cnts7():
 #    text = 'But then the 6,000-year ice age came...'
 #    tokens = EN.tokenize(text)