Kaithem

- Fix bug where NVRChannel would carry over record sessions and thereby crash and not be able to recover from connection failure
- Improve nvr time search

- NVRChannel can now use scipy for way better performance on erosion operations.
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- NVRChannel can now auto reconnect after a network problem.

- Minor tweak to the motion detection algorithm for enhanced resistance to low level noise.
- Water ripple filter now uses alpha blending for better realism.

- BREAKING: NVRPlugin no longer uses a sensitivity value. We have a custom detector and we use a threshold value now
- NVRChannel now reports the raw "level" of motion
- NVRChannel uses a custom motion algorithm that requires Pillow, based on RMS and erosion.
- Retriggering recording in NVRChannel before recording is finished will just append to the active recording
- NVRChannel should no longer crash if you delete a segment dir while it is being written to

- Any module page can now be accessed via it's subfolder
- No more H1 header at the top of most pages, to save screen space
- Dropdown panel to keep an eye on notofications from any page
- Manual and motion-activated NVR recording
- Beholder frontend module for a simplified view of the NVR