Short read de novo assembler using de Bruijn graphs, as published in: D.R. Zerbino and E. Birney. 2008. Velvet: algorithms for de novo short read assembly using de Bruijn graphs. Genome Research, 18: 821-829
for binary writer, store ref masks to .names file
velvetifySequence changed to read from pos 0 to strlen
when sequence names are read, read all chars up to tab
for binary writer, store ref masks to .names file velvetifySequence changed to read from pos 0 to strlen when sequence names are read, read all chars up to tab