added better error message in case of wacky sequence length, see Michel Belis email May 2009
added better error message in case of wacky sequence length, see Michel Belis email May 2009

cjlee112/pygr,cjlee112/pygr,cjlee112/pygr,ctb/pygr,GenDataPro/pygr,RitwikGupta/pygr,GenDataPro/pygr,RitwikGupta/pygr,cjlee112/pygr,ctb/pygr,ctb/pygr,theoryno3/pygr,ctb/pygr,GenDataPro/pygr,RitwikGupta/pygr,ctb/pygr,theoryno3/pygr,theoryno3/pygr