Merge pull request #1 from igloonet/master

merge to 2.1
Russian translation added
More elegant look
Display answered questions in history as question but with another style
Configurable option for autocomplete

Limit autocomplete users only to members of a given project or use any user
Possibility choose questions for answer (configurable option)
Changed subject & sender in mailer
Small fix for russian translation
Some fixes for compatibility with latest redmine trunk
Merge pull request #3 from NEXSTEP/master

some enchancements and fixes
Minor spacing change for readability
Fix to ensure proper color coding of open questions on an issue
Merge from sleavitt