Updated Release

• Streaming IO support is now from (https://github.com/functional-streams-for-scala/fs2)[fs2 streams] and not Akka streams
• All models have smart constructors to build an unparamModel from an Unparameterised Sde (SdeParameter => Sde)
• x0 (representing the the initial state) is now incorporated into a separate Sde class and renamed initialState
• Sdes have smart constructors to build an Unparameterised Sde (SdeParameter => Sde)