Prepare for new OctoPi streaming

This is an update to prepare for the upcoming Octopi streaming: OctoPrint/OctoPi-UpToDate#2

OctoPi 1.0 compatibility

This is a hot patch for OctoPi 1.0 camera update.

2.3.1

• Features to provide more complete and precise print history/stats.
• Fixes the problem of repeated filament change alerts.
• Other bug fixes.

Access OctoPrint storage in the app

Update to this version so that you can browse/search the g-code files in your OctoPrint in the Obico app, and start printing them too!

Also some minor bug-fixes.

Webcam Streaming on Non-RPi SBCs

This is a preliminary version for webcam streaming on non-Raspberry Pi SBCs.

Minor websocket bug fix

• A small websocket retry bug fix. Only small amount of users impacted.

Bug fixes

• Fix the bug that is caused by the imcompatible reconnect logic in websocket-client 1.4 and higher.
• Send printer_event directly to the client so that repeated printer_events can be captured.
• Guard against unconfigured webcam.

Bug fixes

• Bug fix for Pi Camera not being able to stream
• Bug fix for OctoPrint tunneling issue.

Notifications on OctoPrint errors

• OctoPrint errors, such as loss of connection to printers, now are pushed to the web app.
• All-in-one notification page that includes printer events, as well as printer errors.
• Other errors, such as webcam streaming failures, are pushed to the server too.

Temperature fix

• Remove the vendor-specific temperatures to be consistent with OctoPrint.