Minor comment fix
fixed a warning
Added a function to test array w/ nulls in AnyType
reverted the testing null element func in AnyType
Added Null Skipping to Logit
Added count of rows processed to result table
Add processed_rows and skipped_rows in the result table
Revise user doc
Revise install-check
Fixed try block using rebind()
updated the column names of counting skipped
Refactor the parameter validation
fixed params validation
removed the self.dim in group ctrl,
which requires an assumptions that all groups have the same state dim
Fix the all-null input bug for cg
Fix the problem for igd and irls
Debugging
Added null handling + grouping test to install-check
Output the correct skipped/processed rows for the case

where all rows have NULL values
Fixed a small bug: square root of condition number should be used