Add documentation for the timeline shape and color attributes
Add documentation for the timeline shape and color attributes

Signed-off-by: Adam Abeshouse <e590f7f0a4deed7e88bd2eafd3d45712a7f2f919@mskcc.org>

cBioPortal/cbioportal,sheridancbio/cbioportal,cBioPortal/cbioportal,onursumer/cbioportal,n1zea144/cbioportal,sheridancbio/cbioportal,n1zea144/cbioportal,cBioPortal/cbioportal,cBioPortal/cbioportal,sheridancbio/cbioportal,onursumer/cbioportal,onursumer/cbioportal,n1zea144/cbioportal,cBioPortal/cbioportal,sheridancbio/cbioportal,n1zea144/cbioportal,onursumer/cbioportal,sheridancbio/cbioportal,n1zea144/cbioportal,sheridancbio/cbioportal,onursumer/cbioportal,n1zea144/cbioportal,onursumer/cbioportal,n1zea144/cbioportal,cBioPortal/cbioportal