v0.2.1-beta

• Fixes for circular reference genomes
• Memory corruption fixed
• Filter for random short alignments added
• Dynamic programming approach for choosing best combination of mapped
  segments (thanks to @bqminh)
• Alignment computation speedup with SSE instructions (thanks to
  @smolkmo)
• Several memory leaks fixed
• Small duplication detection improved
• --min-residues/-R changed set to 25% (default). All reads that have
  less than 25% mapped are reported as unmapped per default
• --max-segments added. Max number of segments reported for a single
  read