Feature request: plot fraction of reads on the y-axis and choose bin size for error plotting

[osilander]

Hi, It would be great to be able to view the error plots normalised by the total reads in the bin. In addition for long reads it would be useful to set a constant bin size, as the default size of 1 --> 10 --> 50 --> 100 is too small at first (and even 100 might be slightly small when mean read length is 10Kbp). Great and easy to use though. Cheers.