Add a script that computes team fragility for (past or
current) development cycle, on two axis: corporate diversity
fragility (impact if the most active company abandons the
team), and individual fragility (impact if the most active
individual abandons the team).
The script orders them from most fragile to least fragile.
It's based on imperfect Stackalytics data, so any insight
from that analysis should be investigated deeper before
considering it "real".
Change-Id: If3e481af23c3b9d1a12f538e96c3b3c32f543a02
36ce233906