HaroldMills/Vesper: v0.3.15

This release includes many clip album improvements, support for read-only archives (i.e. archives that cannot be modified by the client), support for the Mozilla Firefox and Microsoft Edge browsers, and support for relative recording paths. A more detailed and complete list of changes follows:

• Added forward and back page buttons to clip album.
• Added go to page function to clip album.
• Moved clip album clip filter UI to modal.
• Added support to clip album for spectrogram window size units of seconds and hop size units of percent.
• Added support to clip album spectrograms for Blackman, Hamming, and Nuttall data windows.
• Added support for interactive clip view overlays, including time/frequency points.
• Refactored client JavaScript.
• Migrated some client JavaScript to TypeScript.
• Modified client code as needed to run on Mozilla Firefox and Microsoft Edge browsers.
• Added support for read-only archives.
• Added support for relative recording paths.
• Added Vesper command to adjust clip boundaries.