scripts: mkimage-atv

fixes to make this script work .. ping me on irc if you want to debate
anything
new package: vdr-dummydevice
vdr-plugin-xvdr: update to vdr-plugin-xvdr-7f49bfa
Merge pull request #3019 from chewitt/fix_mkimage-atv

scripts: mkimage-atv
vdr-addon: add dummydevice plugin
xbmc: update FM patch
atvboot: cleanup

changes to put all the boot/installer files in one place instead of
scattering them over multiple packages, and removing the 3rdparty
folder from the .tar file as it’s +12MB and nobody is ever going to use
them
Merge pull request #3023 from chewitt/atvboot_cleanup

atvboot: cleanup
fluxbox: remove decorations