update hp2sm

- SPDIF Audio Mode added.
- Update API added.
update hp-blob

* r3799
  - DL status is displayed in percent.

* r3797
  - Updated config to use wlan0 instead of mlan0.

* r3795
  Web-UI changes:
  - Removed HP manual from web-ui.
  - Added JS scripts.

* r3792
  Web-UI changes.
  - Fixed an language-file issue, which caused UI to crash anytime.
  - Added support for HP2SM get-version request and periodically refreshes version-string inside firmware configuration view.

* r3790
  - Hopefully fixed camera motion-detection issues.

* r3788
  Several Web-UI changes.
  - Updated language files
  - Updated XBMC license text
  - UI displays 'Update available' now

* r3778
  HP BLOB Update.
  - Added support for XBMC un-/installation.
cleanup update directory on reboot
update system-image version
update system-image-update

  fix some obviously bugs in combination with remote

  * prevent apply is forced when download is not completed or
  * proved
  * prevent download failures
  * care of invalid / unset apply or release_ts values