grunwaldlab/metacoder: metacoder 0.3.0

Bug fixes Fixed bug in calc_n_samples where the message reported the number of taxa instead of the number of rows in the table. Fixed bug in heat_tree_matrix that happened when factors were used for treatments (issue #240. zero_low_counts now ignores NAs instead of odd error. compare_groups now ignores NAs instaed of returning NaN Improvements Added more_than option to calc_n_samples so that users can set the minimum threshold for whether a sample is counted or not instead of it always 1. Added calc_prop_samples function for calculating the proportion of samples with a value greater than 0 (issues #233. primersearch is faster and takes less memory by using ape::DNAbin objects internally. Made calc_taxon_abund about 5x faster. New features taxmap objects can be converted to phyloseq objects using as_phyloseq. Added parser for uBiome data. Changes primersearch now takes and returns a taxmap object with results added as tables. primersearch_raw is a new function that behaves like the old primersearch did, returning a table. The dataset option of many functions has been renamed to data to match the option name in the taxa package. Numerous spelling fixes