aiohttp 3 adaptation

[decaz]

aiohttp version 3.0.0 was released and there is the new protocol parameter at StreamReader.__init__ so we need to fix StreamReader initializing.

There are also 2 issues to resolve withing this PR:

• ImportError: No module named 'aiohttp.client_proto'
• Ubiquitous exception: AttributeError: 'generator' object has no attribute '__await__' (maybe because aiohttp version 3.0.0 requires Python 3.5.3+)

[coveralls]

Coverage remained the same at ?% when pulling 8a04b0f on decaz:feature/fix-aiohttp-3 into b16392d on pnuckowski:master.

[kowalski]

@decaz I think that if you retried the failed build it would pass today. six 1.11.0 has been released, which fixes the problem with the setup.

Also I think it makes a lot of sense to add aiohttp3x deps in the tox testing matrix.

diff --git a/tox.ini b/tox.ini
index 6e3e270..d179974 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,7 +2,7 @@
 envlist =
     flake8,
     coverage,
-    {py34,py35}-aiohttp{10,11,12,master}
+    {py34,py35}-aiohttp{10,11,12,3x,master}
 skipsdist=True
 
 [testenv:flake8]
@@ -19,6 +19,7 @@ deps =
     aiohttp10: aiohttp>=1.0,<1.1
     aiohttp11: aiohttp>=1.1,<1.2
     aiohttp12: aiohttp>=1.2,<1.3
+    aiohttp3x: aiohttp>=3.0,<4.0
     aiohttpmaster: https://github.com/KeepSafe/aiohttp/archive/master.tar.gz
     -r{toxinidir}/requirements-dev.txt

[decaz]

Closing in favor of #89.