new feature: display bitrate in statusbar (optional, disabled by default)

doc/config

@@ -201,6 +201,8 @@
 #
 #clock_display_seconds = "no"
 #
+#display_bitrate = "no"
+#
 #regular_expressions = "basic" (basic/extended)
 #
 ##

doc/ncmpcpp.1

@@ -192,6 +192,9 @@ If enabled, user will be asked if he really wants to clear the main playlist aft
 .B clock_display_seconds = yes/no
 If enabled, clock will display time in format hh:mm:ss, otherwise hh:mm.
 .TP 
+.B display_bitrate = yes/no
+If enabled, bitrate of currently playing song will be displayed in statusbar.
+.TP 
 .B ignore_leading_the = yes/no
 If enabled, word "the" at the beginning of tags/filenames will be ignored while sorting items.
 .TP