Move tests folder outside of package

Author: fguillot

kanboard/tests/__init__.py tests/__init__.pykanboard/tests/__init__.py renamed to tests/__init__.py

@@ -4,7 +4,7 @@ envlist = py27,py34,py35,pep8
 [testenv]
 deps =
     -r{toxinidir}/test-requirements.txt
-commands = nosetests --tests kanboard.tests
+commands = nosetests --tests tests
 
 [testenv:venv]
 commands = {posargs}