Hghooks

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- Use the new pyjslint 0.3.1.

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- Add support to jslint through the pyjslint package. Contribution by Manuel
Viera and Pablo Martín.
- Add support for the changegroup hook type in the trachooks.ticket_updater
hook. In this case, merge all changeset messages into one message and
add just one comment to the Trac ticket. Manuel and Pablo.
- Use the server time in the trachooks.ticket_updater hook. Manuel and Pablo.

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- Works with pyflakes 0.5.0 and backwards compatibility for previous versions
- Fixed pep8 --ignore handling, by Waldemar Kornewald

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- Fix a bug with non ascii characters in the commit message

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- Fix a bug when running the pyflakes hook over a syntactically wrong file

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- Make pyflakes hook ignore those code lines with a "pyflakes:ignore"
comment