parsers

unsafeOffset :: Int -> Array.Array a -> Array.Array a

and

unsafeCut :: Int -> Array.Array a -> Array.Array a

or,

unsafeSlice :: Int -> Int -> Array.Array a -> Array.Array a

@harendra-kumar Thoughts?

Currently the code coverage is around 70%. Need help to write tests so as to obtain a code coverage above 90%

To handle concerns raised by @cimendes in #39 and try and make issues with input selection clearer to users e.g., #54 we should add proper use of logging library, default to simple error messages and add a --debug flag to argparse which displays the full traceback.

1. Add boolean debug flag in the generic CLI parser (default False):
   https://github.com/pha4ge/hAMRonization/blob/master/hAM