Extract contig duplication from the self alignment map

[chklopp]

Is your feature request related to a problem? Please describe.
d-genies enables to produce self alignment maps. From these maps it is possible to infer duplicated contigs or contig ends. The idea would be to have a button and a slider (for the minimum size of the duplicated area) and a button alone (fixed value) enabling to produce a list of duplicates and the fasta file of the contigs without duplication

Describe the solution you'd like
From the paf file find duplicated areas coordinates (chaining alignments), from the list of coordinates find the minimum set of contigs and contig parts to remove in order to remove duplication.

Describe alternatives you've considered
Use image analysis to find lines in the plots rather than using the paf file.
Having contig read coverage would improve the duplication discovery. (a file to provide to dgenies?)