finally got all the block creation and metadata issues under control.  Format and create working, including updating the mbr
TODO:
address the known issues, both are show stoppers for write operation
clean up nosfs.js (completely.  It's an ugly mess right now)
Implement remaining HddDriver isr cases in this order: list, write read
complete iProj 4
known issues:
nosfs.makeDirBlock doesn't handle file names too long
nosfs.makeFileBlock doesn't handle files that span blocks