Add more Django/Python to travis/tox#149

Merged

masci merged 1 commit intodjango-oauth:masterfrom

craigbruce:master

Sep 25, 2014

Commits on Sep 5, 2014

django 1.7 tests use 1.7.0 not the RC in tox. Added python34 and django17 environments to travis config
Craig Bruce
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