Added options to timesplit recording feature (now renamed filesplit). Choose to split file by either time or filesize. Also have the option to either start a new file or stop recording at split point. Bumped config version so save your settings before you update your build.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10285 a1c6a512-1295-4272-9138-f99709370657

apps/talk.h

@@ -40,6 +40,7 @@ enum {
     UNIT_PIXEL,   /* pixels */
     UNIT_PER_SEC, /* per second */
     UNIT_HERTZ,   /* hertz */
+    UNIT_MB,      /* Megabytes */
     UNIT_LAST     /* END MARKER */
 };