add v14 release docs (#507)

* add v14 release docs

-update `release-notes.md`
-update `data-files-description.md`
-update `data-formats.md`

* Update download-data.sh

add new folder for V14 to download scipt

* remove intersect_cds_WXS.bed

per @cansavvy [comment](#432 (comment))

* add intersect_cds_lancet.bed

and description from @cansavvy [comments](#507 (comment))

* Update release-notes.md

- add removal of polyA+stranded samples that were still in file in v13

* Update data-formats.md

add more information on gistic output files, to replace PR [#456](#456)

* Reorganize derived CN section and make formatting consistent

* Add links to relevant subtyping modules

* Update release-notes.md

readme update for upcoming lancet MAF per issue [here](#512)

* Update doc/release-notes.md

yup, nice catch

Co-Authored-By: Jaclyn Taroni <jaclyn.n.taroni@gmail.com>

* Update release-notes.md

fix embryonal broad histology

Co-authored-by: Jaclyn Taroni <jaclyn.n.taroni@gmail.com>