Changes to skin_display for vuduo and et10k

Update movieplayer, channelselection, dvdplayer, menu, messagebox,
messagebox simple
More changes to skin_display for vuduo2 and et10k boxes

Service event in medium font
further (simple) messagebox fixes
choicebox fix

(and more to come....)
Add new STRING type to FrontendInfo

Now you can get the frontendinfo in once string including color codes
instead of having long configs in skins
Sorry I forgot to declare res_mgr in FrontendInfo
Some optimalizations for fontdisplay VuDuo/ET10000
FrontendInfo: Do not show empty slots in STRING type
Enigma2 ac3+ cache add patch

Signed-off-by: pieterg <pieterg@users.sourceforge.net>
Merge remote-tracking branch 'pli/master'.