Flask-redis

- Reorganized the module and rewrote everything other than the library code, mainly packaging and CI. There are no user-facing changes in behavior.

- **Backwards incompatible:** The `FlaskRedis.init_app` method no
longer takes a `strict` parameter. Pass this flag when creating your
`FlaskRedis` instance, instead.
- **Backwards incompatible:** The extension will now be registered
under the (lowercased) config prefix of the instance. The default
config prefix is `'REDIS'`, so unless you change that, you can still
access the extension via `app.extensions['redis']` as before.
- **Backwards incompatible:** The default class has been changed to
`redis.StrictRedis`. You can switch back to the old `redis.Redis`
class by specifying `strict=False` in the `FlaskRedis` kwargs.
- You can now pass all supported `Redis` keyword arguments (such as
`decode_responses`) to `FlaskRedis` and they will be correctly
passed over to the `redis-py` instance. Thanks, giyyapan\!
- Usage like `redis_store['key'] = value`, `redis_store['key']`, and
`del redis_store['key']` is now supported. Thanks, ariscn\!

- Made 0.1.0's deprecation warned changes final

- **Deprecation:** Renamed `flask_redis.Redis` to
`flask_redis.FlaskRedis`. Using the old name still works, but emits
a deprecation warning, as it will be removed from the next version
- **Deprecation:** Setting a `REDIS_DATABASE` (or equivalent) now
emits a deprecation warning as it will be removed in the version in
favor of including the database number in `REDIS_URL` (or
equivalent)
- Added a `FlaskRedis.from_custom_provider(provider)` class method for
using any redis provider class that supports instantiation with a
`from_url` class method
- Added a `strict` parameter to `FlaskRedis` which expects a boolean
value and allows choosing between using `redis.StrictRedis` and
`redis.Redis` as the defualt provider.
- Made `FlaskRedis` register as a Flask extension through Flask's
extension API
- Rewrote test suite in py.test
- Got rid of the hacky attribute copying mechanism in favor of using
the `__getattr__` magic method to pass calls to the underlying
client

- Improved Python 3 Support (Thanks underyx\!).
- Improved test cases.
- Improved configuration.
- Fixed up documentation.
- Removed un-used imports (Thanks underyx and lyschoening\!).

- Improved suppot for the config prefix.