Responsive display issues with featured speakers

[kenirwin]

The speaker page changes the shape of speaker photos at different screen widths, and thus selects only a portion of the face to show. Is there a way we can "pin" the photo so it always chooses the top of the face, so we don't get this kind of trouble?

This problem exists for Fobazi's photo in the current layout at:

• 500-767 (Bootstrap's xs to md)
• 957-1500px (most of the lg-lx range)

Some of this may be improvable by adjusting Fobazi's photo, but something that works better in general might be preferable. Not sure what options there might be.

@dwgreen1 - this might interact with changes you propose in PR #98 as well, but is an issue both currently and in that PR