openvpn: cleanup
busybox: re-add 'free' applet
remove package: 'procps-ng'

if anyone still need it - feel free to move to unofficial-addons
busybox: re-add 'less' applet
remove package: 'less'

if anyone still need it - feel free to move to unofficial-addons
xbmc: update to xbmc-13.alpha-0efa87e

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Merge branch 'master' of github.com:OpenELEC/OpenELEC.tv
installer: rework buildscript

Signed-off-by: Stephan Raue <stephan@openelec.tv>