Exon objects now contain links to transcripts containing them. Moreover, transcript-sequence cache hints are now owned by individual transcripts rather than the whole sliceDB.
Exon objects now contain links to transcripts containing them. Moreover, transcript-sequence cache hints are now owned by individual transcripts rather than the whole sliceDB.

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