Make picture optional

[baco]

Sometimes it is required to send a CV without picture, age, gender or nationality to avoid disqualification by discrimination.

So it would be useful to have the possibility to avoid putting the picture field when building the profile. Currently, LaTeX rises an error when the \profilepic command is not used.

[spagnuolocarmine]

I made it optional. Thank you for your suggestion.
I apologize for the super long delay :)