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Tightened up the URI format, fixed some auto-loading issues,
and forced the url_crc32 column to be unsigned.

Had some problems with PuSH and Salmon use of Bookmarks; they were
being required to generate Atom versions of the bookmark _before_ the bookmark was saved.

So, I reversed the order of how things are saved, and associate notices and bookmarks
by URI rather than notice_id.

Break xbImportNode.js and geometa.js back out of util.js; the Makefile in js has been updated to combine them with util.js source when building util.min.js
Revert "combine our standard scripts into one big script"

This reverts parts of commit 0c5ca46b.

When queueing is off, restore runs immediately. Indicate that we've already finished processing on the success page in this case; otherwise continue to show the 'will take a few minutes' message.

Don't trust text/xml mime types; generic content detection gives useless stuff like that on SVG images! Todo: replace the extension check in this case with better content-based checks.