Rename Dispatch.jl --> Methods.jl
Complete the rename
Make DecisionTree independent of Intension
Make DecisionTree independent of Method
Move Method to Methods.jl
Pull building of decision trees into new Dispatch.jl
Remove PNode and using Patterns from Dispatch.jl
Remove code_dispatch blanket method
Make code generation part of DecisionTree into Encode
Tidy up Methods a bit
Pull addmethod! and simplify(!) from Methods and PartialOrder into Dispatch
Make Encode take care of preparing a ResultsDict
A bit of cleanup
Remove scratch files
Remove some unnecessary dependencies