Correct template overriding literals in example settings. Remove unnecessary testing resource files.

Test settings checks item-wise.

More template blocks for easier template overriding.

Fixed #399. Added tests for auth.

Use settings to control relate instance brand name, allow template overriding.

Update python-memcached

Ensure I18N literals were marked correctly via CI.

Backward compatible in terms of literals already translated containing "RELATE" as context in templates.

Ignore PyCharm local files.

overriding.

Fixing this failure

```
Collecting python-memcached==1.58 (from -r requirements.txt (line 81))
  Using cached python-memcached-1.58.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/private/var/folders/yx/tn9fxy1s4qz1vf2cbb5fwlw00000gn/T/pip-build-l3yvlcg7/python-memcached/setup.py", line 8, in <module>
        version=get_module_constant('memcache', '__version__'),
      File "/Users/senthil/py/virtualenvironments/relateenv/lib/python3.6/site-packages/setuptools/depends.py", line 164, in get_module_constant
        return extract_constant(code, symbol, default)
      File "/Users/senthil/py/virtualenvironments/relateenv/lib/python3.6/site-packages/setuptools/depends.py", line 195, in extract_constant
        const = code.co_consts[arg]
    IndexError: tuple index out of range

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/yx/tn9fxy1s4qz1vf2cbb5fwlw00000gn/T/pip-build-l3yvlcg7/python-memcached/
```

Fixed git_source not required when editing course, added more tests.

Added course specific language

Filter endraw.

Tests for #376

Fixed bug (see #391) and sped up course creation for tests.

Used tempfile.mkdtemp for GIT_ROOT in tests

Suppress message printed in migrations above DEBUG level

Refactor tests, and unify page_ordinal -> ordinal in urlconf