[fix] improve setup.py and coala

.coafile

@@ -0,0 +1,4 @@
+[Default]
+bears = PEP8Bear, PyUnusedCodeBear, FilenameBear, InvalidLinkBear
+files = aio_pika/**/*.py
+max_line_length = 120

.travis.yml

@@ -11,6 +11,7 @@ env:
   - TOXENV=py34
   - TOXENV=py35
 install:
-  - pip install tox coveralls
+  - virtualenv -p python3 /tmp/env
+  - /tmp/env/bin/pip install tox coveralls
 script:
-  - tox
+  - /tmp/env/bin/tox

Makefile

@@ -0,0 +1,5 @@
+all: test
+
+test:
+	find . -name "*.pyc" -type f -delete
+	tox

setup.py

@@ -12,6 +12,9 @@
 if sys.version_info < (3, 5):
     requires.append('asyncio')
 
+if sys.version_info < (3, 4):
+    raise RuntimeError("aio-pika doesn't support Python version prior 3.4")
+
 
 setup(
     name='aio-pika',
@@ -40,4 +43,16 @@
     ),
     packages=find_packages(exclude=['tests']),
     install_requires=requires,
+    extras_require={
+        'develop': [
+            'asynctest',
+            'coverage!=4.3',
+            'coveralls',
+            'pytest',
+            'pytest-asyncio',
+            'pytest-cov',
+            'timeout-decorator',
+            'tox>=2.4',
+        ],
+    },
 )

tox.ini

@@ -1,21 +1,28 @@
 [tox]
-envlist = py3{4,5}
+envlist = py3{4,5},qa
+
 
 [testenv]
 setenv =
   AMQP_URL={env:AMQP_URL:amqp://guest:[email protected]/}
 
 passenv = TRAVIS TRAVIS_JOB_ID TRAVIS_BRANCH COVERALLS_REPO_TOKEN
 
-deps=
-  timeout-decorator
-  coveralls
-  asynctest
-  pytest
-  pytest-cov
-  pytest-asyncio
+extras =
+  develop
 
 commands=
-  find . -name "*.pyc" -type f -delete
-  py.test --cov aio_pika --cov-report=term-missing tests 
+  py.test --cov aio_pika --cov-report=term-missing tests
   coveralls
+
+
+[testenv:qa]
+basepython = python3.5
+
+skip_install = True
+
+deps =
+    coala-bears>=0.9
+
+commands =
+    coala --non-interactive