NAME:
meanOmega
PURPOSE:
calculate the mean frequency as a function of angle, assuming a uniform time distribution up to a maximum time
INPUT:
dangle - angle offset
oned= (False) if True, return the 1D offset from the progenitor (along the direction of disruption)
OUTPUT:
mean Omega
HISTORY:
2013-12-01 - Written - Bovy (IAS)
