lavf: Bump minor version and document directory listing API in doc/APIchanges.

doc/APIchanges

@@ -15,6 +15,15 @@ libavutil:     2014-08-09
 
 API changes, most recent first:
 
+2015-03-27 - 184084c - lavf 56.27.100 - avio.h url.h
+  New directory listing API.
+
+  Add AVIODirEntryType enum.
+  Add AVIODirEntry, AVIODirContext structures.
+  Add avio_open_dir(), avio_read_dir(), avio_close_dir(), avio_free_directory_entry().
+  Add ff_alloc_dir_entry().
+  Extend URLProtocol with url_open_dir(), url_read_dir(), url_close_dir().
+
 2015-xx-xx - xxxxxxx - lavu 54.21.100 / 54.10.0
   Add AV_PIX_FMT_MMAL for MMAL hardware acceleration.
 

libavformat/version.h

@@ -30,8 +30,8 @@
 #include "libavutil/version.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 56
-#define LIBAVFORMAT_VERSION_MINOR  26
-#define LIBAVFORMAT_VERSION_MICRO 101
+#define LIBAVFORMAT_VERSION_MINOR  27
+#define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
                                                LIBAVFORMAT_VERSION_MINOR, \