Add READ_EXTERNAL_STORAGE permission for 4.4 (API 19);
Comment some unused code.
Implement repeat-one feature.
1) Better notification layout on 4.0 and later;
2) Fix an issue with noise at the beginning of some psf files;
3) Fix an issue in psf2, that some files fail to play because of psf2_stop() is not invoked.
Merge branch 'DEV_loop_and_4.4_fix'
Merge branch 'master' of https://github.com/mine260309/android-sexypsf-player