GPL
Merge pull request #36 from andrewjpage/master

GPL
update default num threads for spades and velvet to 2
Merge pull request #37 from andrewjpage/spades_num_threads

update default num threads for spades and velvet to 2
specify pathogens gcdepth R script for QC
Merge pull request #38 from andrewjpage/gc_depth

specify pathogens gcdepth R script for QC
added config length filtering default and update assembly version number
Merge pull request #39 from martinghunt/update_assembly_pipeline_version

added config length filtering default and update assembly version number