shifted prime stuff into hashbits
fixed minor bug in ht abundance dist
separated hashtable and hashbits Python interface
separated out subset stuff into subset.*
fixed a bunch of scripts
moved test stuff out of python and into tests/ subdir
fixed make test
removed broken graph-trim.py script
cleaned up the primes mess
minor script fix/mods
fixed parser bug
added neighborhood calculation function
updated subsets deps
updated ht size, output
breadth-truncation of bfs search
updated order of search truncation
tag density parameters
fixed consume_fasta_and_tag for density approach
added annoying surrender set
fixed bad use of _tablesize in Hashbits