Unicorn-binance-local-depth-cache

Changed
- Balanced log levels
Fixed
- KeyError in `stop_depth_cache()`

Changed
- close_timeout=5 in `create_stream()`
Fixed
- `_init_depth_cache()` returns False if `order_book` is False

Fixed
- Wrong proof of `is_stop_request()`

Added
- `_reset_depth_cache()`
- `_get_order_book_from_depth_cache()`
- `is_stop_request()`
Changed
- Clear stream_buffer on disconnect
- Better error handling in `_init_depth_cache()`
Fixed
- `stop_depth_cache()` did not stop its dependent stream and did not clear the stream_buffer
- A few error handling's

Added
- Resetting asks and bits on stream_signal DISCONNECT
Fixing
- `requests.exceptions.ConnectionError` exception while fetching the order_book

Added
- `default_update_interval`
Changes
- a few small :)