Drop support of Python 2.6

review2691002

INSTALL

@@ -4,7 +4,7 @@ Installing trytond_sale_price_list
 Prerequisites
 -------------
 
- * Python 2.6 or later (http://www.python.org/)
+ * Python 2.7 or later (http://www.python.org/)
  * trytond (http://www.tryton.org/)
  * trytond_party (http://www.tryton.org/)
  * trytond_sale (http://www.tryton.org/)

setup.py

@@ -65,7 +65,6 @@ setup(name='trytond_sale_price_list',
         'Natural Language :: Slovenian',
         'Natural Language :: Spanish',
         'Operating System :: OS Independent',
-        'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Topic :: Office/Business',
         'Topic :: Office/Business :: Financial :: Accounting',