doc/APIchanges: fill in missing hashes and dates

doc/APIchanges

@@ -13,88 +13,88 @@ libavutil:     2013-12-xx
 
 API changes, most recent first:
 
-2014-04-xx - xxxxxxx - lavc 55.52.0 - avcodec.h
+2014-05-18 - fd05602 - lavc 55.52.0 - avcodec.h
   Add avcodec_free_context(). From now on it should be used for freeing
   AVCodecContext.
 
-2014-05-xx - xxxxxxx - lavf 55.17.0 - avformat.h
+2014-05-15 - 0c1959b - lavf 55.17.0 - avformat.h
   Add AVMFT_FLAG_BITEXACT flag. Muxers now use it instead of checking
   CODEC_FLAG_BITEXACT on the first stream.
 
-2014-xx-xx - xxxxxxx - lavu 53.14.0 - pixfmt.h
+2014-05-11 - 66e6c8a - lavu 53.14.0 - pixfmt.h
   Add AV_PIX_FMT_VDA for new-style VDA acceleration.
 
-2014-04-xx - xxxxxxx - lavc 55.50.3 - avcodec.h
+2014-05-01 - a2941c8 - lavc 55.50.3 - avcodec.h
   Deprecate CODEC_FLAG_MV0. It is replaced by the flag "mv0" in the
   "mpv_flags" private option of the mpegvideo encoders.
 
-2014-04-xx - xxxxxxx - lavc 55.50.2 - avcodec.h
+2014-05-01 - 6484149 - lavc 55.50.2 - avcodec.h
   Deprecate CODEC_FLAG_GMC. It is replaced by the "gmc" private option of the
   libxvid encoder.
 
-2014-04-xx - xxxxxxx - lavc 55.50.1 - avcodec.h
+2014-05-01 - b2c3171 - lavc 55.50.1 - avcodec.h
   Deprecate CODEC_FLAG_NORMALIZE_AQP. It is replaced by the flag "naq" in the
   "mpv_flags" private option of the mpegvideo encoders.
 
-2014-04-xx - xxxxxxx - avcodec.h
+2014-05-01 - 5fcceda - avcodec.h
   Deprecate CODEC_FLAG_INPUT_PRESERVED. Its functionality is replaced by passing
   reference-counted frames to encoders.
 
-2014-04-xx - xxxxxxx - lavc 55.50.0 - dxva2.h
+2014-04-28 - ed4b757 - lavc 55.50.0 - dxva2.h
   Add FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO for old Intel GPUs.
 
-2014-04-xx - xxxxxxx - lavu 53.13.0 - avutil.h
+2014-04-22 - 502512e - lavu 53.13.0 - avutil.h
   Add av_get_time_base_q().
 
-2014-04-xx - xxxxxxx - lavu 53.12.0 - crc.h
+2014-04-17 - 0983d48 - lavu 53.12.0 - crc.h
   Add AV_CRC_16_ANSI_LE crc variant.
 
-2014-04-xx - xxxxxxx - lavu 53.11.0 - pixfmt.h
+2014-04-07 - 8b17243 - lavu 53.11.0 - pixfmt.h
   Add AV_PIX_FMT_YVYU422 pixel format.
 
-2014-04-xx - xxxxxxx - lavu 53.10.0 - replaygain.h
+2014-04-04 - 8542f9c - lavu 53.10.0 - replaygain.h
   Full scale for peak values is now 100000 (instead of UINT32_MAX) and values
   may overflow.
 
-2014-04-xx - xxxxxxx - lavu 53.09.0 - log.h
+2014-04-03 - 7763118 - lavu 53.09.0 - log.h
   Add AV_LOG(c) macro to have 256 color debug messages.
 
-2014-02-xx - xxxxxxx - lavu 53.08.0 - frame.h
+2014-03-24 - d161ae0 - lavu 53.08.0 - frame.h
   Add av_frame_remove_side_data() for removing a single side data
   instance from a frame.
 
-2014-02-xx - xxxxxxx - lavu 53.07.0 - frame.h, replaygain.h
+2014-03-24 - 5a7e35d - lavu 53.07.0 - frame.h, replaygain.h
   Add AV_FRAME_DATA_REPLAYGAIN for exporting replaygain tags.
   Add a new header replaygain.h with the AVReplayGain struct.
 
-2014-02-xx - xxxxxxx - lavc 55.36.0 - avcodec.h
+2014-03-24 - 5a7e35d - lavc 55.36.0 - avcodec.h
   Add AV_PKT_DATA_REPLAYGAIN for exporting replaygain tags.
 
-2014-02-xx - xxxxxxx - lavf 55.13.0 - avformat.h
+2014-03-24 - 25b3258 - lavf 55.13.0 - avformat.h
   Add AVStream.side_data and AVStream.nb_side_data for exporting stream-global
   side data (e.g. replaygain tags, video rotation)
 
-2014-02-xx - xxxxxxx - lavc 55.35.0 - avcodec.h
+2014-03-24 - 0e2c3ee - lavc 55.35.0 - avcodec.h
   Give the name AVPacketSideData to the previously anonymous struct used for
   AVPacket.side_data.
 
-2014-xx-xx - xxxxxxx - lavu 53.06.0 - pixfmt.h
+2014-03-16 - 1481d24 - lavu 53.06.0 - pixfmt.h
   Add RGBA64 pixel format and variants.
 
-2014-xx-xx - xxxxxxx - lavu 53.05.0 - frame.h
+2014-02-24 - 1155fd0 - lavu 53.05.0 - frame.h
   Add av_frame_copy() for copying the frame data.
 
-2014-02-xx - xxxxxxx - lavr 1.2.0 - avresample.h
+2014-02-22 - 7e86c27 - lavr 1.2.0 - avresample.h
   Add avresample_is_open() for checking whether a resample context is open.
 
-2014-xx-xx - xxxxxxx - lavu 53.04.0  - opt.h
+2014-02-19 - c3ecd96 - lavu 53.04.0  - opt.h
   Add AV_OPT_FLAG_EXPORT and AV_OPT_FLAG_READONLY to mark options meant (only)
   for reading.
 
-2014-xx-xx - xxxxxxx - lavu 53.03.01 - opt.h
+2014-02-19 - 6bb8720 - lavu 53.03.01 - opt.h
   Deprecate unused AV_OPT_FLAG_METADATA.
 
-2014-02-xx - xxxxxxx - lavu 53.3.0 - frame.h
+2014-02-15 - c98f316 - lavu 53.3.0 - frame.h
   Add AV_FRAME_DATA_DOWNMIX_INFO value to the AVFrameSideDataType enum and
   downmix_info.h API, which identify downmix-related metadata.