Changed ffmpeg thumbnailer to instead output a full-size png which is forwarded to the image thumbnailer, to allow it to take advantage of all available scaling options
Changed mime type map to deal with the reality that certain file types have multiple extensions and/or multiple mime types, as well as constants supporting all of the data. Created new functions using the updated mime type map to resolve mime types and extensions. Updated various items around the project that determine mime/extension to take advantage of the new functions.
Added new event to handle fetching media properties like height, width, and the newly added fields, and admin controls to manually scan files for their properties.
Added a search terms content:video and content:audio to search for images that do (or do not) have those flags.
Reads the file and outputs it in chunks rather than all at once, reducing the amount of memory needed to very little, even for very very large files.
Supports http request ranges so that only parts of the file will be returned if requested. This allows in-browser video players to seek to arbitrary points in the video without needing to download the whole file.
Makes use of flush during send to allow the browser to being receiving file data immediately, allowing streamable video formats to begin playing before the server has finished sending the data. This could also be used in the future to add a transmission rate limiter.
Has early-disconnect detection, to terminate sending file data if the client browser has disconnected or aborted (for instance, a user starts a video, then seeks to near the middle, the first request of data will be terminated rather than continuing to process the file).
Bug fixes and consolidation of various thumbnail and resize functionality
Changed resize/rotate extensions to use replace image event
Added content-disposition header to image responses to provide a human-friendly filename when saving
Added more bulk thumbnail regeneration tools
Tweaks to bulk actions to correct totals when batching items
