wavpack 4.70.0, youtube-dl 2014.05.05

Update wavpack and youtube-dl to latest stable releases.
Revert "wavpack 4.70.0, youtube-dl 2014.05.05"

This reverts commit f6536406c57af78f777f2edc8d1047416c774bc5.
wavpack 4.70.0

Update to latest stable release.
youtube-dl 2014.05.05

Update to latest stable release.
wavpack: add 4.70.0 bottle.
youtube-dl: update 2014.05.05 bottle.