Ignore PyCharm IDE project files.
Use http for translation widget as GitHub does not trust CAcert

Signed-off-by: Michal Čihař <michal@cihar.com>
Drop embedded copy of aresource for translate-toolkit

The translate-toolkit 1.11.0 contains all important changes, so there si
no need to ship separate version.

See also issue #459

Signed-off-by: Michal Čihař <michal@cihar.com>
Update po files
PEP8 Fixes for test_models.
Add config for running tests using django-nose.
Override nose default test match regexp.
Ignore lint errors in settings_test_nose.py.
Add some logging to PathMixin's check_rename().
Fix weblate.trans.tests.test_models:ProjectTest failure on subsequent runs.

Check_rename will fail on subsequent runs from same working directory due
to old_path (which is default project path used by many tests) not being removed from previous run:

 Traceback (most recent call last):
  File "/home/vrusinov/workspace/weblate/weblate/trans/tests/test_models.py", line 209, in test_rename
    self.assertFalse(os.path.exists(old_path))
AssertionError: True is not false
Disable lint import-error warnings for optional dependencies.
Fix some PEP8 errors and typos.