Add privacy help to CONTRIBUTING.md
Add privacy help to CONTRIBUTING.md

Some hints that should help people trying to contribute but are afraid about this project being linked to irl.

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haresbarak/meteor-gazelle,sneakysneakysneaky/meteor-gazelle,meteor-gazelle/meteor-gazelle,haresbarak/meteor-gazelle,harrybui22/meteor-gazelle,harrybui22/meteor-gazelle,meteor-gazelle/meteor-gazelle,yash069/meteor-gazelle,yash069/meteor-gazelle,sneakysneakysneaky/meteor-gazelle,meteor-gazelle/meteor-gazelle,harrybui22/meteor-gazelle,haresbarak/meteor-gazelle,yash069/meteor-gazelle,sneakysneakysneaky/meteor-gazelle