release 51.1

• add -f flag seqchksum_merge.pl script to allow specification of a file
  of globs to identify inputs
• we will stop generating fastqcheck files soon, so we should not
  try to get the number of reads in a fastq file from information
  in a fastqcheck file
• add HISAT2 index build to Ref_Maker

50.16

• RefMaker: updated to generate STAR aligner reference genome indexes
• Travis not to build illumina2bam as its jar(s) are not used anymore

50.12

• seqchksum_merge.pl
  updated to generate chksums on the fly is given a bam file
  added new column class (partition) to partition data when merging.
  modified and extended tests. N.B. running the script on multiple bam files
  should generate the same values as bamcat + bamseqchksum but the
  order is no longer guaranteed to be the same
• RefMaker: added extra dict symlink for RNA SeQc
• code changes to reduce number of warnings under Perl 5.22.2