version 0.6.15

• nanny: use ifindex to reference workers in managed devices
  and hold worker references when starting fsm (bsc#904061)
• nanny: Always reference mdev's worker by ifindex (bsc#904061)
• nanny: register discovered devices only when ready (bsc#904061)
• events: query and update device name on events (bsc#904061)
• udev: verify netdev index and update name at start, disable
  ready handling if udev is not used, e.g. in LXC (bsc#904061)
• xml: don't require parent's control node in config (bsc#901517)
• wireless: use string dict entry for WIRELESS_AP/bssid (bsc#911315)
• extensions: fixed false errors from hostname update (bsc#910323)
• tuntap: typo fix causing to not set IFF_NO_PI flag
• fixed some memory leaks in client and dbus object code
• doc/ChangeLog: do not omit merge commits which contain bug refs