simple tox.ini has been added

tox.ini

@@ -0,0 +1,30 @@
+[tox]
+envlist = py26,py27,pep8
+
+[testenv]
+setenv = VIRTUAL_ENV={envdir}
+         NOSE_WITH_OPENSTACK=1
+         NOSE_OPENSTACK_COLOR=1
+         NOSE_OPENSTACK_RED=0.05
+         NOSE_OPENSTACK_YELLOW=0.025
+         NOSE_OPENSTACK_SHOW_ELAPSED=1
+         NOSE_OPENSTACK_STDOUT=1
+deps =
+  -r{toxinidir}/tools/pip-requires
+  -r{toxinidir}/tools/test-requires
+commands = nosetests savanna/tests {posargs}
+
+[tox:jenkins]
+downloadcache = ~/cache/pip
+
+[testenv:pep8]
+deps = pep8==1.3.3
+commands =
+  pep8 --repeat --show-source --exclude=.venv,.tox,dist,doc,test,resources,tools .
+  pep8 --repeat --show-pep8 --show-source --filename=savanna* bin
+
+[testenv:cover]
+setenv = NOSE_WITH_COVERAGE=1
+
+[testenv:venv]
+commands = {posargs}