Adds permissions to let users edit and/or delete their messages (#854, patch by Markus Knittig with slight changes).

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Users with same username or email are automatically mapped. Mapping can be manually adjusted in repository settings. Multiple usernames can be mapped to the same Redmine user.

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Changes ApplicationHelper#gravatar_for_mail to #avatar that takes a User or a String (less code in views).

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Fixes: Git Adapter date parsing ignores timezone (#2149).

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* Plugins' routes.rb are now added automatically to Redmine's routing,
  including the ability to override Redmine's default routing.

  Thank you to Jean-Baptiste Barth for the suggestion.  #2142


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Fixed: broken subject when submitting issue via email written in japanese (Patch #2059 by Go MAEDA).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@1990 e93f8b46-1217-0410-a6f0-8f06a7374b81

Host setting should contain the path prefix (Redmine base URL) to properly generate links in emails that are sent offline (#2122).

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