Avoid adding functions of same name to the repulsion dataset

[MohamadMansouri]

This was discussed here #17

Note: I am using the shell to do base64 decoding, I did this since I saw you reporting some problems with the python base64 method. This is costing some time. If the decoder of the base64 python3 library doesn't have such problems lets use it instead.

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[MohamadMansouri]

I signed it!

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