Removed old test files

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Signed-off-by: Andrew D. Horchler <adh9@case.edu>
Updated function for finding period of a signal

better error checking, handles multidimensional case better. Still needs to be checked for correctness and could be improved with an interpolation option.

Signed-off-by: Andrew D. Horchler <adh9@case.edu>
Improved parameter generation for some non-uniform cases

Better method of finding the minimum amount to adjust Nu by.

Also a minor fix to mean period function.

Signed-off-by: Andrew D. Horchler <adh9@case.edu>