Anomalous sequence update (#65)

* Include modellable_params argument in Model class.

This can be used if you do not want rough heuristics to be used to decide which params have modellable values

* rerun black formatting

* - seperate functions for laplace smoothing
- store intermediate non laplace smoothed counts in model class

* use deepcopy instead of copy to prevent original variable from being edited

* try change the way laplace smoothing is done for param counts

* undo experimental change to laplace smoothing for params

* change how the param probabilities are computed. (changed from categorical mistake to bernoulli)

* update tests based on changes on how to calculate param probabilities

* fix one docstring issue in laplace_smooth module

* Add module for sessionizing data

* handle nans when sessionizing and aggregating

* fix bug in create_session_col function when we have 0 rows in df

* write tests for the new sessionize module

* include notebook showing how to use anomalous_sequence sub package

* add kql magic temp files to gitignore

* add AnomalousSequence rst file to DataAnalysis section

* Some formatting fixes

Co-authored-by: Ian Hellen <ianhelle@microsoft.com>

.gitignore

@@ -115,3 +115,6 @@ morphchart_package/
 
 # Merge conflict files
 **.orig
+
+#kql magic temp files
+/docs/notebooks/kqlmagic/*