added submit wrapper, get_path, check_path
results utilities
removed unused method, added spacing
added a few comments
reorganization, doc strings
added check_file
added a comment
join to get_path
submit wrapper has default mem
things and things
Merge pull request #73 from wasade/resultsutils

Resultsutils
added method for parsing identified data
added parse_previously_printed
moving bits to modules
added methods for dealing with phyla plots
addressing most comments
Add trim_fasta and concatenate_files
Add tests for concatenate_files and trim_fasta
tests for filter_mapping_file
expanded docstr