Wrapping code for detecting strep repeats.

This module wraps the code referred to by the following article:

Identification, variation and transcription of pneumococcal repeat sequences. Croucher NJ1, Vernikos GS, Parkhill J, Bentley SD. BMC Genomics. 2011 Feb 18;12:120. doi: 10.1186/1471-2164-12-120.

and available at ftp://ftp.sanger.ac.uk/pub/pathogens/strep_repeats/.