Update jQuery dependencies

[swahtz]

This updates the website from vulnerable jQuery 1.4.3 and 1.7.1 copies to jQuery 3.7.1, resolving the nine open Dependabot alerts associated with the two vendored jQuery files.

Changes

• Added a verified local copy of jQuery 3.7.1 and updated the Home, About, Documentation, Download, Forum, and License pages to use it.
• Removed the vulnerable jquery-1.4.3.min.js and camera/jquery.min.js files.
• Removed the duplicate jQuery include and obsolete customized jQuery Mobile dependency from the Camera slideshow.
• Updated the Camera slideshow to replace removed jQuery APIs such as .live() and $.browser with jQuery 3-compatible behavior.
• Updated the About page and FancyBox integration to remove obsolete browser detection and other legacy jQuery assumptions.
• Updated the legacy mousewheel integration to use jQuery's current event dispatch API.
• Updated jQuery UI from 1.9.2 to 1.14.2 for compatibility with jQuery 3.7.1.
• Removed obsolete minified copies that are no longer referenced by the website.

Testing

• Served the website locally over HTTP and verified that all six main site sections load jQuery 3.7.1.
• Verified that the Home page slideshow initializes and completes a transition without runtime errors.
• Verified that the About page details controls, FancyBox image viewer, and mousewheel handling work without runtime errors.
• Verified that the Download page loads jQuery UI 1.14.2 and that a dialog can be opened and closed.
• Verified that all local script references resolve successfully.