Log Message:
Update to 1.1.1:

2013-05-24  Philip Kendall  <philip-fuse@shadowmagic.org.uk>

        * libspectrum 1.1.1 released.

        * Decreased libtool version to allow binaries built against
          libspectrum 1.0.0 to run with libspectrum 1.1.1.

2013-05-18  Philip Kendall  <philip-fuse@shadowmagic.org.uk>

        * libspectrum 1.1.0 released.

        * Support for Spectranet in snapshots (Philip Kendall).

        * Support for Cheetah SpecDrum in snapshots (Fredrick Meunier).

        * Support reading PZX files (Fredrick Meunier).

        * Support for the TZX set signal level block (Fredrick Meunier).

        * Various minor bug fixes/improvements:
          * Add support for detecting POK files (Sergio Baldoví).
          * Advertise support for bzip2 compressed and wav files (Sergio
            Baldoví).
          * Drop support for GLib version 1.x (Alberto Garcia).
          * Add support for audiofile 0.3.x (Alberto Garcia).
          * Load all snapshot RAM pages for machines with more than 128k
            (Fredrick Meunier; thanks, ketmar).
          * Support more SZX 1.5 features (Fredrick Meunier).
          * Modernise autoconf support (Sergio Baldoví).