1) Started work on porting Shewhart algo.
2) Changed data to allow its args to be passed through any algo. This
allows for the data type to be switched without changing algo
implementation.
3) Removed data based args from algo.
4) Now pass threshold and num SE to use in error as args values.
Updated data to allow args to be passed in as a dict.
Updated test to allow data args to be passed through. Changed the defaults for fmt and label within the plot system.
Created excetions for use within dislib.