Tracvatar

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- Added support for the trac 1.0 database
API, courtesy Ryan Ollos and Leho Kraav.

- Add support for gravatar in "metanav"
menu, courtesy Leho Kraav.

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- Added support for libravatar, courtesy
Ralph Bean.

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- Fixed KeyError which could arise
when viewing the change history
for a ticket.

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- Added support for gravatar in
"ticket comment diff" screen.

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- Fixed bug where a NULL stored as the
author of a ticket comment would
cause a variety of NoneType errors.

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- Detect if https:// is in use, generate
https:// Gravatars in this case.

- Fixed bug whereby ui would crash on
the "browse" page of a multiple-repository
setup with no default repository