Fix logic of feature_renamer_series if feature_rename_col or feature_data don't exist
explicitly test expressiondata, not splicing data as basedata
Increase ngenes to 500, fix beta parameter to 20, fix bug in randomly assigning genes to categories
add test for no multiindex data
save technical outliers as an attribute
add tests for technical outliers, fix thresholding test
add technical outliers fixture
add outliers, reduce na thresh params for simplicity
use original data columns for feature data, use backup thresh and minimum samples
use base data to test
temporarliy pass test_embark
test threshold, variant, outliers
use numpy divide instead of native python divide
temporarily comment out nonworking tests
parametereize test expression data