Add caching section to simulation docs
Add caching section to simulation docs

[ci-skip]

bricegnichols/urbansim,ual/urbansim,apdjustino/urbansim,apdjustino/urbansim,VladimirTyrin/urbansim,SANDAG/urbansim,waddell/urbansim,UDST/urbansim,ual/urbansim,ual/urbansim,apdjustino/urbansim,bricegnichols/urbansim,synthicity/urbansim,UDST/urbansim,SANDAG/urbansim,VladimirTyrin/urbansim,synthicity/urbansim,SANDAG/urbansim,waddell/urbansim,AZMAG/urbansim,UDST/urbansim,VladimirTyrin/urbansim,waddell/urbansim,ual/urbansim,bricegnichols/urbansim,SANDAG/urbansim,bricegnichols/urbansim,AZMAG/urbansim,apdjustino/urbansim,synthicity/urbansim,AZMAG/urbansim,waddell/urbansim,AZMAG/urbansim,VladimirTyrin/urbansim,UDST/urbansim,synthicity/urbansim