Don't use Docker on travis

* Issues with capabilities and network

(c) Copyright IBM Corp. 2015

.travis.yml

@@ -1,14 +1,10 @@
-sudo: required
-
 language: python
-
 python:
+    - 2.7
+    - 3.3
     - 3.4
-
-services:
-    - docker
-
+    - 3.5
 script:
-    - make test
-    - make sdist
-    - make install
+    - python setup.py sdist
+    - pip install --no-use-wheel dist/*.tar.gz
+    - python -B -m unittest discover

Makefile

@@ -3,13 +3,14 @@
 
 .PHONY: bash clean dev help sdist test
 
-
 IMAGE:=jupyter/minimal-notebook:4.0
+
+DOCKER_ARGS?=
 define DOCKER
 docker run -it --rm \
 	--workdir '/srv/kernel_gateway' \
 	-e PYTHONPATH='/srv/kernel_gateway' \
-	-v `pwd`:/srv/kernel_gateway
+	-v `pwd`:/srv/kernel_gateway $(DOCKER_ARGS)
 endef
 
 help: