Add CREDIT file with name of all contributors

Contributor list comes from https://github.com/FreshRSS/FreshRSS/graphs/contributors
Note I didn't take responsability to add information such as personal website
or email address. If you want these information appear feel free to update
the file!

CREDITS

@@ -0,0 +1,36 @@
+This is a credit file of people who have contributed to FreshRSS with, at least,
+one commit on the FreshRSS repository (at https://github.com/FreshRSS/FreshRSS).
+Please note a commit on THIS specific file is not considered as a contribution
+(too easy!). It's purpose is to show even the smallest contribution is important.
+People are sorted by name so please keep this order.
+
+---
+
+Alexandre Alapetite
+https://github.com/Alkarex
+
+Alexis Degrugillier
+https://github.com/aledeg
+
+Alwaysin
+https://github.com/Alwaysin
+
+Amaury Carrade
+https://github.com/AmauryCarrade
+
+Luc Didry
+https://github.com/ldidry
+
+Marien Fressinaud
+dev@marienfressinaud.fr
+http://marienfressinaud.fr
+https://github.com/marienfressinaud
+
+Nicolas Elie
+https://github.com/nicolaselie
+
+plopoyop
+https://github.com/plopoyop
+
+tomgue
+https://github.com/tomgue