addurl, importfeed: Changed to honor annex.largefiles settings, when the content of the url is downloaded. (Not when using --fast or --relaxed.)

importfeed just calls addurl functions, so inherits this from it.

Note that addurl still generates a temp file, and uses that key to download
the file. It just adds it to the work tree at the end when the file is small.

Command/Import.hs

@@ -129,7 +129,7 @@ start largematcher mode (srcfile, destfile) =
 			else moveFile srcfile destfile
 		ifM (checkFileMatcher largematcher destfile)
 			( Command.Add.perform destfile
-			, Command.Add.performSmall destfile 
+			, next $ Command.Add.addSmall destfile 
 			)
 	notoverwriting why = do
 		warning $ "not overwriting existing " ++ destfile ++ " " ++ why