converting authors file into a metadata

[ghost]

this commit does basically aim at:

• converting authors file into a .md file;*

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I would also suggest that:

• we create a .txt version of it;*
• we create a .rst version of it;*
• we create an .html version of it;*

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further more I believe it is important to:

• create files with contribution policy, a readme, and so on so forth following the same template