Normally Bitbucket renders Readme.MD by default for a folder, it would be nice if this wasn't as tightly coupled to the name readme.md.

 

Instead it could pick Readme.md if it exist, if not, then if there is a single .md file in the folder, of any name, it would pick that instead.

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If there is more than one MD file, i could see some options:
 A) If there is a Readme.md, render than, otherwise render none.
 B) If there is a Readme.md, otherwise render the first .md file found, if any.
 C) If there is a Readme.md, otherwise render a list of .md files, if any.