v0.8.0

• Fix regression of Base64 encoding on Android platform. When large chunk of Base64 data was sent from Android it contained new lines characters.
• Updated RxAndroidBle to version 1.4.3.
• Fixed colissions in Characteristic and Service id generation on Android. The collisions had place if multiple devices with the same characteristic/service UUIDs were connected at the same time.
• Fixed dropped notifications right after setup on Android. Before there was small window when notification was monitored and listener for it wasn't mounted.
• Minor documentation updates.