Test and support Python 3.6 (#181)

Add py36 to the Travis CI config, and setup.py classifiers.

Also tweak local tox config, install twisted for 3.6 and make
noptionals variant use 2.7 and 3.6 only, as suggested by
@brian-brazil in review.

Author: bz2

.travis.yml

@@ -33,8 +33,10 @@ matrix:
       env: TOXENV=py34
     - python: "3.5"
       env: TOXENV=py35
-    - python: "3.5"
-      env: TOXENV=py35-nooptionals
+    - python: "3.6"
+      env: TOXENV=py36
+    - python: "3.6"
+      env: TOXENV=py36-nooptionals
     - python: "pypy"
       env: TOXENV=pypy
 

setup.py

@@ -28,6 +28,7 @@
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: 3.5",
+        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Topic :: System :: Monitoring",

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = coverage-clean,py26,py27,py34,py35,py36,pypy,{py27,py35,py36}-nooptionals,coverage-report
+envlist = coverage-clean,py26,py27,py34,py35,py36,pypy,{py27,py36}-nooptionals,coverage-report
 
 
 [base]
@@ -12,7 +12,7 @@ deps =
     {[base]deps}
     py26: unittest2
     ; Twisted does not support Python 2.6.
-    {py27,py34,py35,pypy}: twisted
+    {py27,py34,py35,py36,pypy}: twisted
 commands = coverage run --parallel -m pytest {posargs}
 
 
@@ -21,7 +21,7 @@ commands = coverage run --parallel -m pytest {posargs}
 deps = {[base]deps}
 commands = coverage run --parallel -m pytest {posargs}
 
-[testenv:py35-nooptionals]
+[testenv:py36-nooptionals]
 deps = {[base]deps}
 commands = coverage run --parallel -m pytest {posargs}
 
@@ -37,4 +37,4 @@ deps = coverage
 skip_install = true
 commands =
     coverage combine
-    coverage report
+    coverage report