Updated test_bio_calc.py
Updated test_bio_calc.py

Tested raw_abundance() function on newer version of OTU table.
Added multiple tests for a combination of parameters for
raw_abundance().
Updated test_transform_raw_abundance() function with hand calculations
and testing.
Updated single quotation marks to double quotation marks.
[ci skip]

akshayparopkari/phylotoast,smdabdoub/phylotoast