bleak 0.7.0 on Python PyPI

Added

Better feedback of communication errors to user in .NET backend and implementing error details proposed in #174.
Two devices example file to use for e.g. debugging.
Detection/discovery callbacks in Core Bluetooth backend Scanner implemented.
Characteristic handle printout in service_explorer.py.
Added scanning filters to .NET backend's discover method.

Replace NSRunLoop with dispatch queue in Core Bluetooth backend. This causes callbacks to be dispatched on a background thread instead of on the main dispatch queue on the main thread. call_soon_threadsafe() is used to synchronize the events with the event loop where the central manager was created. Fixes #111.
The Central Manager is no longer global in the Core Bluetooth backend. A new one is created for each BleakClient and BleakScanner. Fixes #206 and #105.
Merged #167 and reworked characteristics handling in Bleak. Implemented in all backends; bleak now uses the characteristics' handle to identify and keep track of them. Fixes #139 and #159 and allows connection for devices with multiple instances of the same characteristic UUIDs.
In requirements.txt and Pipfile, the requirement on pythonnet was bumped to version 2.5.1, which seems to solve issues described in #217 and #225.
Renamed HISTORY.rst to CHANGELOG.rst and adopted the Keep a Changelog format.
Python 3.5 support from macOS is officially removed since pyobjc>6 requires 3.6+
Pin pyobjc dependencies to use at least version 6.2. (PR #194)
Pin development requirement on bump2version to version 1.0.0
Added .pyup.yml for Pyup
Using CBManagerState constants from pyobj instead of integers.

Removed documentation note about not using new event loops in Linux. This was fixed by #143.
_central_manager_delegate_ready was removed in macOS backend.
Removed the bleak.backends.bluez.utils.get_gatt_service_path method. It is not used by
bleak and possibly generates errors.

Improved handling of the txdbus connection to avoid hanging of disconnection clients in BlueZ backend. Fixes #216, #219 & #221.
#150 hints at the device path not being possible to create as is done in the get_device_object_path method. Now, we try to get it from BlueZ first. Otherwise, use the old fallback.
Minor documentation errors corrected.
CBManagerStatePoweredOn is now properly handled in Core Bluetooth.
Device enumeration in discoverand Scanner corrected. Fixes #211
Updated documentation about scanning filters.
Handle missing isScanning boolean on macOS < 10.13. Fixes #234.