document new release testing procedure
clarify release instructions
make a release candidate first
retain FASTQ format through partitioning
fix extract-partitions to keep FQ if the input was FQ
update setup.py for screed fix
fixed error on empty files
added friendly and informative output to extract-partitions
updated ChangeLog for partition_fq_fix branch
untested galaxy integration for normalize-by-median
remove unused help text; fix parameter references