Release v3.4.1

Installation image, md5sum, and installation guide:

• Will be available in the next release.

Features and Improvements

1. Provide default detection application after installation is completed.
2. Change service management from systemd to supervisor.
3. Fix camera.py FPS parameter type.
4. Fix berrynet.log permission issue.

Incompatible Changes

1. berrynet-manager refactoring is on-going, and can not work currently.
2. JS-based input clients (e.g. camera.js, localimg.js) refactoring is on-going, and can not work currently.