Implement like/unlike/dislike request and make them visible in the FMAudioPlayer class.
Remove the observer before deallocating the object. This fixes iOS8 crash when skipping.
Merge pull request #2 from GrioSF/like-dislike-feature

Implement like/unlike/dislike request and make them visible in the FMAud...
Merge pull request #3 from GrioSF/ios8-skip-crash-fix

Remove the observer before deallocating the object. This fixes iOS8 cras...