Fixed av transcription bug not accounting for missing directories

updated whisper so it can use wheel

now does not create empty dirs when no transcription and empty dirs also does not break manifests

cleaned up the transcription script

a/v transcription now handles cases where files have no audio track

Now handles thumbnails for short videos

added console command to index hocr for a collection

switched to lxml html parser for html

optimized hocr searching

bumped version

hocr content search index now limits to document

fixed failing on missing hocr dirs

hocr indexer now ignores when hocr not present

hocr indexer now ignores when hocr not present

bumped version and updated docs