Enable GitLab CI

.gitlab-ci.yml

+py27_django18:
+  script:
+    - "virtualenv-2.7 ./py27_django18"
+    - "./py27_django18/bin/pip install -U 'Django>=1.8,<1.9' ldap3"
+    - "./py27_django18/bin/python ./runtests.py"
+
+py27_django19:
+  script:
+    - "virtualenv-2.7 ./py27_django19"
+    - "./py27_django19/bin/pip install -U 'Django>=1.9,<1.10' ldap3"
+    - "./py27_django19/bin/python ./runtests.py"
+
+
+py34_django18:
+  script:
+    - "virtualenv-3.4 ./py34_django18"
+    - "./py34_django18/bin/pip install -U 'Django>=1.8,<1.9' ldap3"
+    - "./py34_django18/bin/python ./runtests.py"
+
+py34_django19:
+  script:
+    - "virtualenv-3.4 ./py34_django19"
+    - "./py34_django19/bin/pip install -U 'Django>=1.9,<1.10' ldap3"
+    - "./py34_django19/bin/python ./runtests.py"
+
+