doc/APIchanges: Add av_find_best_pix_fmt_of_2() and av_get_pix_fmt_loss()

also add deprecation note for avcodec_get_pix_fmt_loss(), avcodec_find_best_pix_fmt_of_2()

Found-by: wm4
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

doc/APIchanges

@@ -306,6 +306,10 @@ API changes, most recent first:
   Deprecate CODEC_FLAG_INPUT_PRESERVED. Its functionality is replaced by passing
   reference-counted frames to encoders.
 
+2014-04-30 - 617e866 - lavu 52.81.100 - pixdesc.h
+  Add av_find_best_pix_fmt_of_2(), av_get_pix_fmt_loss()
+  Deprecate avcodec_get_pix_fmt_loss(), avcodec_find_best_pix_fmt_of_2()
+
 2014-04-29 - 1bf6396 - lavc 55.60.100 - avcodec.h
   Add AVCodecDescriptor.mime_types field.