Add links to research groups

[dslambrecht]

The graphics currently only need to link to the individual research groups. Sort alphabetically.

• Lillian Chong: http://www.pitt.edu/~ltchong/
• Rob Coalson: http://www.pitt.edu/~coalson/
• Geoff Hutchison: http://hutchison.chem.pitt.edu/
• Ken Jordan: http://pitt.edu/~kjtheory/
• Daniel Lambrecht: http://lambrecht.chem.pitt.edu/
• Peng Liu: http://www.pitt.edu/~pengliu/