- epm play: add flashplayer
- epm play: add audiorelay
- epm play: add virtualbox-extpack
- esu: add support for quoted args (with spaces)
- epm play: use esu instead of $SUDO
- epm play common.sh: check for package status before remove
- epm downgrade: download files by pkg_urls in a common place
- epm downgrade: run downgrade only for installed packages