Released libsidplayfp-1.7.0

Libsidplayfp (and its console frontend sidplayfp) is a fork of sidplay2 born with the aim to improve the quality of emulating the 6581, 8580 chips and the surrounding C64 system in order to play SID music better.

Changelog:
* Add an interface to access tune data
* Remove generated files only for maintainer-clean target [bugs:#14]
* Rework Makefile rules for generated files
* Silence some warnings
* Other minor changes in reSIDfp
* Merge minor changes from zxtune fork

Also available a new Windows binary sidplayfp-1.3.0-lib1.7.0