lavf: bump minor and add an APIChanges entry for avformat cleanup

doc/APIchanges

@@ -12,6 +12,11 @@ libavutil:   2009-03-08
 
 API changes, most recent first:
 
+2011-04-08 - lavf 52.106.0 - avformat.h
+  Minor avformat.h cleanup:
+    a9bf9d8 deprecate av_guess_image2_codec
+    c3675df rename avf_sdp_create->av_sdp_create
+
 2011-04-03 - lavf 52.105.0 - avio.h
   Large-scale renaming/deprecating of AVIOContext-related functions:
     724f6a0 deprecate url_fdopen

libavformat/version.h

@@ -24,7 +24,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 52
-#define LIBAVFORMAT_VERSION_MINOR 105
+#define LIBAVFORMAT_VERSION_MINOR 106
 #define LIBAVFORMAT_VERSION_MICRO  0
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \