Changelog:

• Fixed several minor issues related to path handling in vsrepo.
• Added _version_ and _api_version_ to Python module to make detecting version mismatches easier.
• Improved rounding in averageframes.
• Fixed averageframes not properly rejecting more than 31 weights or nodes.
• Fixed crash in textfilter line wrapping introduced in R49.
• Fixed regression introduced in R48 where expr, sobel and prewitt wouldn't clamp 9-15 bit output to valid range.
• Fixed crash due to null pointer dereference when instantiated many Vapoursynth classes directly in Python.

1. Loaded script for motion interpolation (using external MVTools plugin) in mpv.
2. Checked filter list to ensure that Vapoursynth is present in the filter chain.
3. Checked that motion interpolation works (mpv shows 30 FPS specified and 60 FPS estimated, video looks smooth with typical compensation artifacts).