change the setup.py and travis file, remove python2.6 support, caused that the newer version of PyQuery don't support python2.6

.travis.yml

@@ -1,10 +1,10 @@
 language: python
 python:
-  - "2.6"
   - "2.7"
   - "3.3"
   - "3.4"
   - "3.5"
+  - "3.6"
 # command to install dependencies
 install: "pip install -r requirements.txt"
 # command to run tests

setup.py

@@ -45,13 +45,12 @@ setup(
         "Development Status :: 5 - Production/Stable",
         "Environment :: Console",
         "Intended Audience :: Developers",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.6",
         "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.2",
         "Programming Language :: Python :: 3.3",
         "Programming Language :: Python :: 3.4",
+        "Programming Language :: Python :: 3.5",
+        "Programming Language :: Python :: 3.6"
         "Topic :: Documentation",
     ],
     keywords='howdoi help console command line answer',