Fixed licence headers

...l/lumc/sasc/biopet/extensions/bedtools/BedtoolsSort.scala

...la/nl/lumc/sasc/biopet/extensions/hisat/Hisat2Build.scala

...t/scala/nl/lumc/sasc/biopet/extensions/BedToolsTest.scala

...n/scala/nl/lumc/sasc/biopet/tools/bamstats/BamStats.scala

.../scala/nl/lumc/sasc/biopet/tools/bamstats/Histogram.scala

...main/scala/nl/lumc/sasc/biopet/tools/bamstats/Stats.scala

...l/lumc/sasc/biopet/tools/flagstat/FlagstatCollector.scala

...ala/nl/lumc/sasc/biopet/tools/bamstats/BamStatsTest.scala

...scala/nl/lumc/sasc/biopet/tools/bamstats/CountsTest.scala

...la/nl/lumc/sasc/biopet/tools/bamstats/HistogramTest.scala

.../scala/nl/lumc/sasc/biopet/tools/bamstats/StatsTest.scala

docs/examples/pom.xml

...mc/sasc/biopet/pipelines/gwastest/impute/Impute2Vcf.scala

...asc/biopet/pipelines/gwastest/impute/Impute2VcfTest.scala

...elines/shiva/variantcallers/HaploTypeCallerGvcfTest.scala