Test on Python 3.5 using travis, temporary disable docker build until stable release

.travis.yml

@@ -1,6 +1,6 @@
 language: python
 python:
-  - 2.7
+  - 3.5
 services:
  - docker
 install:
@@ -24,8 +24,8 @@ before_install:
   - pip install -U pytest mock pytest-cov selenium
   - pip install codecov
   - pip install coveralls
-  - docker build -t zeronet .
-  - docker run -d -v $PWD:/root/data -p 15441:15441 -p 127.0.0.1:43110:43110 zeronet
+  # - docker build -t zeronet .
+  # - docker run -d -v $PWD:/root/data -p 15441:15441 -p 127.0.0.1:43110:43110 zeronet
 after_success:
   - codecov
   - coveralls --rcfile=src/Test/coverage.ini