Safer class name, now checked by the compiler

...asc/biopet/extensions/picard/AddOrReplaceReadGroups.scala

...mc/sasc/biopet/extensions/picard/CalculateHsMetrics.scala

...et/extensions/picard/CollectAlignmentSummaryMetrics.scala

.../sasc/biopet/extensions/picard/CollectGcBiasMetrics.scala

...c/biopet/extensions/picard/CollectInsertSizeMetrics.scala

.../sasc/biopet/extensions/picard/CollectRnaSeqMetrics.scala

...l/lumc/sasc/biopet/extensions/picard/GatherBamFiles.scala

...l/lumc/sasc/biopet/extensions/picard/MarkDuplicates.scala

...nl/lumc/sasc/biopet/extensions/picard/MergeSamFiles.scala

...la/nl/lumc/sasc/biopet/extensions/picard/ReorderSam.scala

...la/nl/lumc/sasc/biopet/extensions/picard/SamToFastq.scala

...scala/nl/lumc/sasc/biopet/extensions/picard/SortSam.scala