Update copyrights for 2010

Issue #90: Move to direct-call framework design ...

Rather than signalling events everywhere and letting extension plugins
handle them if they choose to, the framework should be reworked to
directly call functions on the appropriate integration plugin. This will
both reduce overhead from events and simplify plugin work by removing if
statements at the beginning of every event handler.

This will require follow-on changes to all source integration plugins to
work with the new parent class API.

Version bump in Source plugin to signify API changes.

Improve performance on large repositories.

Fix #28: Updated copyrights from '20081 to '2008-2009'

Fix #13: Convert project license to AGPL3.

Fixed pagination links for list page.

Fix error/notice on changeset list page.

Better intermediat pagination blocks.

Enhanced changeset list pagination.

Factored out changeset list into new View API.

Tweaks to links and layout.

Enhanced output for changeset lists and detail views.

Moved changeset message above changeset files. ...

Other various output tweaks.

Moved to EVENT_SOURCE_SHOW_CHANGESET *not* needing to return the repo name.

Added more changeset info to the changeset listing.

Added basic changeset detail viewer.

Rough draft of a generic changeset viewer.