basecaller for Nanopore sequencer

 The Nanopore is a device for DNA/RNA sequencing that does
 not require an amplification of the material. The polynucleotides
 are threaded through a pore and while these pass through,
 the change in the electrostatic potential allows one to
 identify ("call") the actual base that resides in the pore.
 Scrappie goes a step further and also attempts to describe
 modifications to the nucleic acid.