VoIPStream: refactored for new ffmpeg library

- added some error detection
- refactored resampling
- uses bytes instead of bits
- replace deprecated functions
- remove obsolete code
VoIPStream: oppfeatures, makefrag
VoIPStream: fixed examples

- run test with all input files
- modified some mp3 files (ffmpeg crashed on original file)
VoIPStream: modified fingerprint tests

moved VoIPStream tests to a new csv file
added more tests for different audio input files