People page image lazy loading

We want to find some way to speed up the loading of images for the people page.

*Expected:*

Faster loading of images via some sort of lazy loading:
1. Load lower res images first then query for higher resolution (I think we already have something like this)
2. Don't load DAML Alumni until the rest of DAML has loaded

*Actual:*

Loading images for everyone in DAML takes a really long time now (4-5 seconds).