Add Model type and create the TimeWarp function
rename functions
Add GetN to Set: Fetches up to N points from the set before start_date
Add Probability to Model: Calculates proability of new timestamp given set
Add some unit tests and debug some stuff
Implement most of Model. Write some tests. Adjust Monitor as needed.
Ad UnWarp
Test for GetN
go fmt and remove commented code
Merge pull request #2 from boourns/time_models

Add time models