You may recall that Chris Avenir, a first-year chemical engineering student at Ryerson University in Toronto, Canada, faced expulsion after it came to light that he had created a Facebook-based chemistry study group.  The horror, the horror!Chris Avenir’s apparent exhortation to fellow Ryerson University engineering students to “input solutions” to assignment problems on the social networking site raised the ire of a professor.On Tuesday, the 18-year-old was told that while he wouldn’t be expelled he would