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This fixes an awesome bug where restoring from a pipe would not work,
because that's the case where you're going to see short Read()s.

Should help improve the quality of matches.

The idea is to support a set of metadata checks of various
kinds, to select books in large databases for further processing.

The bleve API has changed slightly, too.

There aren't any external tools to backup a LevelDB database, so it's
nice to have a way to do so safely: the dump method is exposed to
localhost on the web interface.

Update head template to enable responsiveness in bootstrap theme

See merge request !2