Expand support for testing with python 3.5

As that's the state of the art.

For travis we install python 3.5 as the base python and then test
from there. This gets around some limitations in travis.

.travis.yml

@@ -1,5 +1,7 @@
 sudo: false
 language: python
+python:
+      - "3.5"
 install:
       - pip install tox 
 script:
@@ -9,12 +11,13 @@ env:
       - TOXENV=py32
       - TOXENV=py33
       - TOXENV=py34
+      - TOXENV=py35
       - TOXENV=pypy
       - TOXENV=pypy3
       - TOXENV=pep8
-      - TOXENV=py34-failskip
-      - TOXENV=py34-limit
-      - TOXENV=py34-prefix
+      - TOXENV=py35-failskip
+      - TOXENV=py35-limit
+      - TOXENV=py35-prefix
 
 notifications:
       irc: "chat.freenode.net#gabbi"

README.rst

@@ -11,7 +11,7 @@ Gabbi is a tool for running HTTP tests where requests and responses
 are represented in a declarative YAML-based form. See the docs_ for
 more details on features and formats.
 
-Gabbi is tested with Python 2.7, 3.4 and pypy and pypy3.
+Gabbi is tested with Python 2.7, 3.4, 3.5 and pypy and pypy3.
 
 Tests can be run using `unittest`_ style test runners or from the
 command line with a `gabbi-run`_ script.

setup.cfg

@@ -18,6 +18,7 @@ classifier =
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.3
     Programming Language :: Python :: 3.4
+    Programming Language :: Python :: 3.5
     Topic :: Internet :: WWW/HTTP :: WSGI
     Topic :: Software Development :: Testing
 

tox.ini

@@ -1,7 +1,7 @@
 [tox]
 minversion = 1.6
 skipsdist = True
-envlist = py27,py33,py34,py35,pypy,pypy3,pep8,limit,failskip,docs,py34-prefix,py34-limit,py34-failskip
+envlist = py27,py33,py34,py35,pypy,pypy3,pep8,limit,failskip,docs,py35-prefix,py35-limit,py35-failskip
 
 [testenv]
 deps = -r{toxinidir}/requirements.txt
@@ -15,7 +15,7 @@ deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands = {posargs}
 
-[testenv:py34-prefix]
+[testenv:py35-prefix]
 setenv = GABBI_PREFIX=/snoopy
 
 [testenv:pep8]
@@ -29,10 +29,10 @@ commands = {toxinidir}/test-limit.sh
 [testenv:failskip]
 commands = {toxinidir}/test-failskip.sh
 
-[testenv:py34-limit]
+[testenv:py35-limit]
 commands = {toxinidir}/test-limit.sh
 
-[testenv:py34-failskip]
+[testenv:py35-failskip]
 commands = {toxinidir}/test-failskip.sh
 
 [testenv:cover]