add new virutal device functions from vdr 2.1.2
push version to 0.2.0
Merge remote-tracking branch 'upstream/master'
update changelog
new version 0.2.1

- put cUdev classes into a namespace, since pvrinput uses the same code
- add some vdr 2.1.3 compatibility stuff
- remove an undetected NULL pointer dereference at udev monitor
Merge branch 'master' into yavdr_master
update changelog
add vdr-abi dependency