Added a queuing model with Fsolve

Extracted data and aimsun file from the multi model SO code, and then
got a working version of the QFsolve code for the small network. It
doesn't work for the larger network, yet and gives NAN values. Could be
an issue with the code, or with the data I extracted.
Revert "Added a queuing model with Fsolve"

This reverts commit 34ced919fcd2c362f75f06b7b431b0eadaa3e6f1.
Added a queuing model with Fsolve

works for a small network. Not yet for the larger one.