1.8.0

Bug fixes:

• Fixed bug in Motif object subsetting (#1162)
• Fixed bug in FeatureMatrix() where cell names would not be converted correctly when running
  with cells=NULL (#1198)
• Fixed bug causing crash when fragment file line lengths are very large (#723)

Other changes:

• Improved fold change calculation (#1174)
• Added subset() method for Fragment-class objects
• Set random seed within CoverageTrack to enable reproducible coverage plots (#1206)
• Add ability to plot region using gene name in PeakPlot(), LinkPlot(), and
  AnnotationPlot() (#919)
• Change Motif class definition to allow any CsparseMatrix in the data slot