Add more python versions, fix tests

.travis.yml

@@ -3,9 +3,11 @@ language: python
 cache: pip
 
 python:
+    - "2.7"
     - "3.3"
     - "3.4"
     - "3.5"
+    - "3.5-dev"
     - "nightly"
 
 install:

tests/tests.py

@@ -14,7 +14,7 @@ class TestPyTaxonomies(unittest.TestCase):
         print(self.taxonomies)
 
     def test_expanded_print(self):
-        for name in self.taxonomies.taxonomies_names:
+        for name in self.taxonomies.keys():
             tax = self.taxonomies.get(name)
             print(tax.print_expanded_entries())