(tox) Moved everything test-related to /tests
(tox) Added tox.ini and updated .gitignore
(tox) Fixed failing tests

Changed the path to test_files in tests and added this folder to MANIFEST.in
(tox) Moved test files

Moved test files from test_files/ to tests/files/ and updated paths in tests. Also updated MANIFEST.in to reflect this change.
(tox) Fixed failing tests again

Re-added test files folder to MANIFEST.in so that image dependency is in the right place for tests to pass.
(tox) Removed --use-mirrors from tox.ini
Merge branch 'master' into tox

Conflicts:
	.gitignore
(tox) Added flag to tox.ini
Merge pull request #8 from pbs/tox

Integrated Tox