filterReads: filter out reads based on mapq and LQ20
In hubentu/VarReviewer: Variant Reviewer

filter out reads based on mapq and LQ20

1	filterReads(reads, baseQ13 = NULL, mapq = 20)

`reads`	The sequence of reads, a GAlignments object. Assumed to have a column qual of PhredQuality objects or a column mapq of mapping quality.
`baseQ13`	Choose reads with the number of at most bad base quality (< 13). default NULL
`mapQ`	Remove all reads with quality less than mapq. Default 20. Set to NULL to keep all reads.