Merge branch 'add-gitlab-ci' into 'master'

Enable GitLab CI

*Description of changes*

Add a `.gitlab-ci.yml` so we can have multiple services (including Jenkins, once I fix it).

*Related to:*  None

See merge request !65

.gitlab-ci.yml

@@ -0,0 +1,22 @@
+before_script:
+  - apt-get update -qq
+  - apt-get install -y python python3 python-dev python3-dev
+  - curl -O https://bootstrap.pypa.io/get-pip.py
+  - python get-pip.py
+  - pip install -r dev-requirements.txt
+
+python2:
+  script:
+    - tox -e py27
+
+python3:
+  script:
+    - tox --skip-missing-interpreters -e py34,py35
+
+linters:
+  script:
+    - tox -e linters
+
+docs:
+  script:
+    - tox -e docs

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion=2.3.1
-envlist = py27,py33,py34,py35,flake8
+envlist = py27,py33,py34,py35,flake8,linters,docs
 
 [testenv]
 deps =
@@ -35,7 +35,7 @@ deps =
     pyflakes
     pylint
 commands =
-    pylint flake8
+    pylint src/flake8
 
 [testenv:doc8]
 basepython = python3
@@ -66,7 +66,7 @@ use_develop = false
 deps =
     bandit
 commands =
-    bandit -r flake8/ -c .bandit.yml
+    bandit -r src/flake8/ -c .bandit.yml
 
 [testenv:linters]
 basepython = python3