optional file_id for consistent download urls
1. Added a new Tcl procedure to the content repository's library, named
cr_write_content, which properly writes content to the connection
regardless of RDBMS and storage type. This simplified a bunch of stuff
(which explains the removed files).
2. Fixed a lot of general comments issues regarding HTML vs. Plain/Text,
attachments, etc.
3. Partially ported glossary.
Forgot to define binary files before importing, so .gifs were messed up.
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