0.5.2

Version 0.5.2

bugfixes:

• paired_end_read_merger don't crash on nested reads
  due to quality issue (heavy quality-timming or aligner soft-clipping)
  one read can be entirely fit within it's paired mate

• aln2basecnt don't crash on CDC IRMA's .bam with N cigar operators
  SAMv1: For mRNA-to-genome alignment, an N operation represents an intron.
  For other types of alignments, the interpretation of N is not defined.