Need to validate the significance tests in testDiversity

[Jason Vander Heiden]

Does low sequence counts and/or low clone size (low clone size variance) lead to inflated significance scores from testDiversity()? This needs to be tested and corrected if that's the case.

[Jason Vander Heiden]

Swapped this for the Chao et al, 2014 bootstrap from inferred complete abundance distribution. This should resolve the inflation, but it still needs to be tested.

[Jason Vander Heiden]

Low sequence counts (<1000) may still be a problem. We might need to redo the inference of the complete clonal abundance distribution with each bootstrap realization or something.