Bintray recently added "Readme" and "Release Notes" sections to package pages in the web UI. A new feature would be a way for to specify these fields for artifacts distributed to Bintray.
This could be set by detecting a file specifically called "Readme" that is found among the artifacts to distribute. It could be attached to a special Artifactory property much like how the "Map Properties to Bintray Attributes" setting works.
Adding this feature would also users to distribute their packages automatically and speed up publishing releases to Bintray.