Move printing of CLI stuff to stderr.
Move printing of CLI stuff to stderr.

- Printing to stdout corrupts the stream when used with "-o -".

ultravideo/kvazaar,ultravideo/kvazaar,lu-zero/kvazaar,lu-zero/kvazaar,ultravideo/kvazaar,lu-zero/kvazaar,ultravideo/kvazaar,ultravideo/kvazaar,lu-zero/kvazaar