fatt: refactored
fatt: accepts separator with ID in FASTQ
fatt: refactored
fatt: refactored
fatt: refactored strlen(f.b)
Merge pull request #1 from tomoakin/master

Report N70, N80, N90 lengths.
fatt: n60-90 stats were wrong
new version
FIX: fatt misrecognized FASTQ separators
FIX: fatt.cc did not buffer inputs well
ADD: fatt can output version
FIX: help msg of fatt extract do not show all options
ADD: fatt convertqv
ADD: doc of fatt convertqv
ADD: fatt buffers cout
ADD: fatt composition