Reimplemented the recent call list and the function to add the last calling number to the list.
Version number goes up to 1.0!!! Everything is working now!!! (at least everything I wanted to implement at first, and some more things).
Changes:
- Implemented recent call list number adding.
- Fixed a bug causing CID data to be missed before a call was blocked, because PWM pin was not going back to High-Z.
- Some code clean-up.