[FEATURE] replace String classes with StringUtils
[API] HashGrid2, Cluster and LocalClustering added
Merge remote-tracking branch 'upstream/develop' into feature/MultiplexClustering2
[API] MultiplexClustering added
[API] getPeakWidth added
[API] PeakWidthEstimator finished
[API] PeakWidthEstimator constructor fixed
[API] grid spacing constructed
[API] constructor finished
[API] cluster() finished
[INTERNAL] debug output collected
[API] write debug output added
[API] write debug finished
[DOC] MultiplexClustering docu
[API] write debug fixed
[INTERNAL] hash grid construction fixed
[DOC] comments in peak picker corrected
[INTERNAL] fixed peak boundaries
[INTERNAL] minor changes
[TEST] spline replaced by linear regression in peak width estimation