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