Redmine-2.1 compatible version

[nettsundere]

• Project summary
• Mass tag assignment and detachment
• Issue journal logging
• Tests

[retorquere]

I would prefer to merge the 2.0 version first. 2.0 (and very soon, 2.1) is going to be the main target, and tests on that must pass.

[nettsundere]

This is a redmine-2.1-compatible version. At https://github.com/Undev/redmine_tagging you can see branches for redmine-1.4 and redmine-2.1

[nettsundere]

I found a wiki tagcloud related bug, will fix it as soon as possible in this request.

[nettsundere]

Fixed, now everything should be ok