Update to 1.7.
Manually increase shlib minor in CMake files since upstream
didn't react to my question why it went down with this release.

TagLib 1.7 (Mar 11, 2011)
=========================

1.7:

* Fixed memory leaks in the FLAC file format parser.
* Fixed bitrate calculation for WAV files.

1.7 RC1:

* Support for reading/writing tags from Monkey's Audio files. (BUG:210404)
* Support for reading/writing embedded pictures from WMA files.
* Support for reading/writing embedded pictures from FLAC files (BUG:218696).
* Implemented APE::Tag::isEmpty() to check for all APE tags, not just the
  basic ones.
* Added reading of WAV audio length. (BUG:116033)
* Exposed FLAC MD5 signature of the uncompressed audio stream via
  FLAC::Properties::signature(). (BUG:160172)
* Added function ByteVector::toHex() for hex-encoding of byte vectors.
* WavPack reader now tries to get the audio length by finding the final
  block, if the header doesn't have the information. (BUG:258016)
* Fixed a memory leak in the ID3v2.2 PIC frame parser. (BUG:257007)
* Fixed writing of RIFF files with even chunk sizes. (BUG:243954)
* Fixed compilation on MSVC 2010.
* Removed support for building using autoconf/automake.
* API docs can be now built using "make docs".

(wiz)