merge branch 'dev-stat' into dev
implemented Clean and removed Tounk and Unmask
removed now-redundant Prettyprint
tidied Clean help
Merge branch 'dev-clean' into dev
removed fsubseq subcommand (use gff3 and bedtools)
clarified help
Merge branch 'dev-stat' into dev
added TODO list
updated TODO
Merge branch 'dev-stat' into dev
stat: added output delimiter option
fixed ParseHeader.firstword
fixed deathbug in winnow
extracted guess_type function from FileDescription class
Merge branch 'dev' into dev-stat
added guess type funtionallity to stat
stat: implemented ugly histogram for lengths