model: Small modification in BestRoute strategy

There is no real need to call parent's (green-yellow-red strategy's)
DoPropagateInterest method, since everything what it is doing is already
incorporated in the logic of the BestRoute strategy.

closes #32
bindings: Rescanned python bindings
topology-reader: Adding support for adding and configuring ErrorModel on each link

Thanks to Saran Tarnoi for the initial implemenation
model: Add ability to get pointer to Fib from fib::Entry
Merge feature branch 'feature/topology-reader-error-model'
docs: Adding research papers section to ndnSIM website
model+tracers: Implementing ability to trace satisfied/timed out interests

Implementing satsified/timed out interest tracing in L3AggregateTracer and L3RateTracer (only numbers)