release-1.12

bioaln:

• Allow BLAST input in bioaln

biotree:

• make biotree -m more efficent by avoiding pair-wise
  OTU distances
• Add options:
  --label-selected-nodes
  --del-low-boot
  --mid-point
  --as-text
• change option --distance to --dist

Bio::BPWrapper::SeqManipulations:

• Added support for IUPAC codes
• Added support for multimple sequence files
  when performing restriction analyses

Correct and expand documentation, add PDF reference