Remove py26 from our CI tests

Author: emmanvg

.travis.yml

@@ -1,6 +1,5 @@
 language: python
 python:
-  - "2.6"
   - "2.7"
   - "3.3"
   - "3.4"

docs/getting_started.rst

@@ -10,7 +10,7 @@ This page gives an introduction to **python-stix** and how to use it.
 Prerequisites
 -------------
 
-The python-stix library provides an API for creating or processing STIX content. As such, it is a developer tool that can be leveraged by those who know Python 2.6/2.7 and are familiar with object-oriented programming practices, Python package layouts, and are comfortable with the installation of Python libraries. To contribute code to the python-stix repository, users must be familiar with `git`_ and `GitHub pull request`_ methodologies. Understanding XML, XML Schema, and the STIX language is also incredibly helpful when using python-stix in an application.
+The python-stix library provides an API for creating or processing STIX content. As such, it is a developer tool that can be leveraged by those who know Python 2.7/3.3+ and are familiar with object-oriented programming practices, Python package layouts, and are comfortable with the installation of Python libraries. To contribute code to the python-stix repository, users must be familiar with `git`_ and `GitHub pull request`_ methodologies. Understanding XML, XML Schema, and the STIX language is also incredibly helpful when using python-stix in an application.
 
 .. _git: http://git-scm.com/documentation
 .. _GitHub pull request: https://help.github.com/articles/using-pull-requests

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py26, py27, py33, py34, py35, py36, lxml23, no-maec
+envlist = py27, py33, py34, py35, py36, lxml23, no-maec
 
 [testenv]
 commands =
@@ -13,7 +13,7 @@ deps =
 # We call this "lxml23" instead of "rhel6", since RHEL6 ships with LXML 2.2.3.
 # python-stix requires at least 2.3.
 [testenv:lxml23]
-basepython=python2.6
+basepython=python2.7
 commands =
     nosetests stix
 deps =
@@ -32,8 +32,7 @@ deps =
 
 [travis]
 python =
-  2.6: py26, lxml23, no-maec
-  2.7: py27, docs, no-maec
+  2.7: py27, docs, lxml23, no-maec
   3.3: py33, no-maec
   3.4: py34, no-maec
   3.5: py35, no-maec