(tox) Moved test files to cmsroles/tests/

Moved everything test-related to cmsroles/tests/ and created tox.ini file.
(tox) Renamed and removed test files
(tox) Base tox.ini and related changes

Added base tox.ini file;
Changed .gitignore and other old test-related files.
Merge branch 'master' into tox
Add needed settings to have tests running.
(tox) Cleaned setup.py
(tox) Made things work

Removed added settings just for tests to work;
Cleared tests/__init__.py file;
Added changedir and changed default py.test command in tox.ini.
(tox) Moved results xml file
Merge pull request #20 from pbs/tox

Integrated Tox