Documentation
Style
Documentation for Student's T-test
Add specialize pragma for Student's T-test
Make things more type-safe
Style edits
Allow 0 and 1 in CL
Use new data type for T-test

Also fix problem with loss of precision for some extreme differences
between samples.
Expand ducumentation for chi2 test

Also add INLINABLE pragma
Allow any vector in KS test
Use correct function to construct CL for KS test
Rename Student's T test.

Generally all test function have tes in their name