vdr-plugin-burn

This release contains the following features and bugfixes:

- fixed compiling on VDR 1.6
- adapted to VDR 1.7.20 and removed erroneously introduced dependency on liemikuutio patch
- removed video fifo which was only required by vdrsync.pl
- removed deprecated direct member access if compiled with VDR 1.7.21+
- fixed indention of folders in recording menu
- adapted recordings menu to VDR 1.7.21 layout
- fixed status menu updates
- outsourced settings for Project X to vdrburn-dvd.conf (thanks to Keine_Ahnung@vdr-portal.de for the idea and code snippets)