Log Message:
Update ssdeep to 2.13.

** Version 2.13 - 24 Apr 2015

* New Features

  - Added fuzzy_set_total_input_length function to the API.
  - Added support for files up to 192GB.
  - Added support for arbitrary length input from the standard input.

* Bug Fixes

  - Fixed issue when comparing hashes from relatively simple files.
  - Fixed portability issues.

** Version 2.12 - 24 Oct 2014

* Bug Fixes

  - Fixed issue when comparing identical hashes but with different
    block sizes.