add git-lint-diff travis checks

.travis.yml

@@ -2,11 +2,19 @@ language: python
 python:
   - "2.7"
   - "3.4"
-  - "3.5"
 addons:
  apt:
    packages:
    - gcc
    - libgeoip-dev
-install: "pip install -r requirements.txt"
-script: nosetests
+   - libcrack2-dev
+install:
+  - "pip install tox"
+  - "pip install -r requirements.txt"
+script:
+  - nosetests
+  - tox
+env:
+  - TOXENV=py27-flake8
+  - TOXENV=py27
+  - TOXENV=py34

tox.ini

@@ -0,0 +1,41 @@
+[tox]
+skipsdist = True
+envlist =
+    py27
+    py34
+    py27-flake8
+
+[testenv]
+commands = nosetests
+deps =
+    nose
+    -rrequirements.txt
+
+[testenv:py27]
+basepython = python2.7
+deps =
+     {[testenv]deps}
+
+[testenv:py34]
+basepython = python3.4
+deps =
+     {[testenv]deps}
+
+
+[testenv:py27-flake8]
+basepython = python2.7
+deps =
+     flake8
+     git+https://github.com/russell/git-lint-diff.git#egg=git-lint-diff
+commands = git-lint-diff --linter flake8 -- flake8
+
+[testenv:py34-flake8]
+basepython = python3.4
+deps =
+     flake8
+     git+https://github.com/russell/git-lint-diff.git#egg=git-lint-diff
+commands = git-lint-diff --linter flake8 -- flake8
+
+[flake8]
+builtins = _
+exclude = .venv,.git,.tox,dist,doc,*lib/python*,*egg,build,*migrations*