changed numbers to letters
Now works as well when called with 'mpirun -np 1'. Also added log output
for progress of each single node.
Now compares running times for different number of nodes in test case.
Filtering of NA values in get_distinct_taxa and get_species_for_taxon
was somehow lost. Readding.
Adapted get_nodes_for_table such that it can deal with 'NA' columns in
the taxa table. Function should not be called with just a simple index
anymore.
moved progress counter to ParallelService
now including all possible ranks from NCBI taxonomy