Log Message:
Update to cuetools to 1.3.1.

Changes since 1.3.0
-------------------

* Fixed duplicate/missing breakpoints (bug #5965).

* Fixed swapped flags in TOC parsing code (bug #4831).

* Fixed option handling code (bug #4180).

Changes since 1.2
-----------------

* Build system has been rewritten using automake/autoconf.

* Added append, prepend, and split pregap modes to cuebreakpoints.

* Fixed possible compilation error with Bison.

* All tools accept long options.

* Programs exit if --input-format or --output-format is an illegal value.