New caching movieplayer

[simsong]

Main features:

• [ ] New modular design
• [x] Preloads all frames and caches them.
• [ ] Shows full trace as the movie progresses

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 70.55215% with 48 lines in your changes are missing coverage. Please review.

Project coverage is 85.31%. Comparing base (59339cc) to head (bf69f9f).

Files	Patch %	Lines
bottle_api.py	69.23%	28 Missing :warning:
db.py	31.57%	13 Missing :warning:
bottle_app.py	70.58%	5 Missing :warning:
db_object.py	81.81%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #402 +/- ## ========================================== + Coverage 84.72% 85.31% +0.59% ========================================== Files 23 23 Lines 2749 2847 +98 ========================================== + Hits 2329 2429 +100 + Misses 420 418 -2 ```

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[simsong]

accepting. Code coverage is at 85%, which is considered quite good by industry standards, even if only 70.55% of the patch itself has coverage.