ER and AT are now separate protocols in TruSeq PCR-free
Remove old TruSeq PCR-free file
Worked on #16: Using spawned subprocesses

- Added checkbox for final hold to form
- Centrifuge, seal, peel and cycling is now run as a sp
- Tips are taken from column 1 if protocol is run standalone
Worked on #16: Waste is brought in and out for purification

To keep position 1 clear