Update pin names

[bessman]

Change all instances of

• ID1/2/3/4 -> LA1/2/3/4
• SEN -> RES
• AN8 -> VOL
• CNTR -> FRQ
• W1/2 -> SI1/2

[Nanak360]

I would like to work on it. It will be very helpful if I could get a little more information.

I see many instances of ID1, ID2, SEN
Should I change them all in each and every file?

[bessman]

Thanks! Yes, that's right. Every instance in every file.

[Nanak360]

All right, I'll work on it. Would you please assign me?
I would also like to know if this contribution will be a part of Hacktoberfest.

[bessman]

Sure, we can opt in and tag your pull request as hacktoberfest-approved.

[Nanak360]

@bessman I have changed each and every instance from all the files and created a pull request. Please guide me through, what do I do now for the Hacktoberfest part.

[bessman]

Fixed by #141.