Drop support for Python 2.6

.travis.yml

@@ -1,7 +1,6 @@
 language: python
 
 python:
-  - "2.6"
   - "2.7"
   - "3.3"
   - "3.4"

setup.py

@@ -19,7 +19,6 @@ setup(
         'Development Status :: 4 - Beta',
         'License :: OSI Approved :: MIT License',
         'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.3',