Unicorn-binance-websocket-api

- wrong version in manager class ...

Added
- is_manager_stopping()
Fixed
- is_update_available returns False if github API is not available.

Changed
- get_monitoring_status_icinga(): update check

Added
- get_monitoring_status_icinga(): reconnects and update check
- get_monitoring_status_plain()
- start_monitoring_api()
- 1 hour cache for release checks on GitHub
- stop_monitoring_api()
Rewrite
- ./tools/icinga/check_binance_websocket_api_manager (check_command for ICINGA)
Changed
- example_monitoring.py

Added
- example_monitoring.py and tools/check_binance_websocket_api_manager
- get_monitoring_status_icinga tests for available updates and changes the `return_code` to WARNING if an update is
available. but I recognized an API ban from GitHub in cause of too many requests. I have to extend it ...
Changed
- get_monitoring_status_icinga: changed `status` dict node to `return_code`

Changed
- changing output of get_monitoring_status_icinga