remove spurious console logging from report
we also do GC-content distribution now
add rebuilding if git hash changed!
introduce acgtDo(), shorthand for when something needs to be done on a nucleotide
move qToErr to dnamisc
add git hash to output
update README to point to a working URL for demo report
rename git-version wording to git-hash, move the hash to a .o file so we only need to relink on a change