update Travis CI configuration to include pep8/pyflakes testing

.travis.yml

@@ -1,11 +1,6 @@
 language: python
 python: 2.7
-before_install:
-  - mkdir -p buildout-cache/eggs
-  - mkdir -p buildout-cache/downloads
-install:
-  - python bootstrap.py -c travis.cfg
-  - bin/buildout -c travis.cfg -N -q -t 3
-script: bin/test
+install: make install
+script: make tests
 notifications:
   email: guido.stevens@cosent.net

Makefile

@@ -0,0 +1,18 @@
+# convenience makefile to boostrap & run buildout
+# use `make options=-v` to run buildout with extra options
+
+pep8_ignores = E501
+options = -N -q -t 3
+
+prerequisites:
+	sudo apt-get install -qq pep8 pyflakes
+	mkdir -p buildout-cache/downloads
+
+install: prerequisites
+	python bootstrap.py -c travis.cfg
+	bin/buildout -c travis.cfg $(options)
+
+tests:
+	bin/test
+	pyflakes plonesocial/
+	pep8 --ignore=$(pep8_ignores) plonesocial/