Add RARFileSource as internal filter.
Merge pull request #46 from Armada651/rfs

Add RARFileSource as internal filter.
MpaDecFilter: use standard coefficients for downmix matrix.
update Changelog.txt
InternalFiltersConfig*.h: fix copyright year
<added disabled code> MpaDecFilter: if back channels do not have sound, then divide side channels for the back and side (tiket #2901)
build.bat: Remove /zip switch
MpaDecFilter: if back channels do not have sound, then divide side channels for the back and side (tiket #2901)
Updated German translation.