- changed externremux.sh's default location to VDRCONFDIR/plugins/streamdev
- added sample externremux.sh from http://www.vdr-wiki.de/
- stop providing channels after client has been disabled at runtime
- added logging of the client device's card index
- changed default suspend mode to "Always suspended"
- added "Hide Mainmenu Entry" setup option on client
- dropped unused code for remote timers/recordings on client side
- dropped unused files client/{assembler,menu,remote}.[hc]
- dropped unused files in libdvbmpeg (reported by tobi)
