define_feature: Define the features on which reads will be counted
In ChromSCape: Analysis of single-cell epigenomics datasets with a Shiny App

Define the features on which reads will be counted

1	define_feature(ref, peak_file, n_bins, bin_width, geneTSS, aroundTSS)

`ref`	Reference genome
`peak_file`	A bed file if counting on peaks
`n_bins`	A number of bins if divinding genome into fixed number of bins
`bin_width`	A number of bins if divinding genome into fixed width bins
`geneTSS`	A logical indicating if feature should be counted around genes TSS instead
`aroundTSS`	Region to take in account around genes TSS