[Feature, Plugin] lastfm_scrobbler_viewer

a plugin to view lastfm scrobbler logs

uses print cell to give a spreadsheet view of scrobbler logs

buffers the whole file if possible otherwise it reads entries from disk

rudimentary text searching for columns
include / exclude; all/any and case sensitive

Change-Id: Id9616e5796658952fba4ea747f596cb77d6f34c0

apps/filetypes.c

@@ -129,6 +129,7 @@ static const struct filetype inbuilt_filetypes[] = {
     { "fmr",  FILE_ATTR_FMR },
     { "fms",  FILE_ATTR_FMS },
 #endif
+    { "log",  FILE_ATTR_LOG   },
     { "lng",  FILE_ATTR_LNG   },
     { "rock", FILE_ATTR_ROCK  },
     { "lua",  FILE_ATTR_LUA   },