Fixed previous yaml load commit and added a tox.ini file.

DETAILS:
- Apparently a potential security issue with yaml.load vs yaml.safe_load.
  Like pickling, yaml.load could result in arbitrary code being run.
- tox.ini file includes the flake8 settings for this project, build spec for 2.7
  and line for eventually testing the project.

.gitignore

@@ -8,3 +8,5 @@ _site/
 /build
 /dist
 /bootstrap_vz.egg-info
+/.tox
+/.coverage

bootstrapvz/common/tools.py

@@ -67,7 +67,7 @@ def load_json(path):
 def load_yaml(path):
 	import yaml
 	with open(path, 'r') as fobj:
-		return yaml.load(fobj)
+		return yaml.safe_load(fobj)
 
 
 def config_get(path, config_path):

tox.ini

@@ -0,0 +1,10 @@
+[flake8]
+ignore = E101,E221,E241,E501,W191
+max-line-length = 110
+
+[tox]
+envlist = py27
+
+[testenv]
+# Once tests have started being written, uncomment this to run tests when running tox.
+#commands = nosetests -v tests --with-coverage --cover-package=bootstrapvz --cover-inclusive