Add an helper script to regenerate POTFILES.in file.

POTFILES.in was updated.
French translation was updated.

po/POTFILES.in

@@ -2,73 +2,42 @@
 ./src/bar_info.c
 ./src/bar_sort.c
 ./src/cache.c
-./src/cache-loader.c
 ./src/cache_maint.c
 ./src/cellrenderericon.c
 ./src/collect.c
 ./src/collect-dlg.c
 ./src/collect-io.c
 ./src/collect-table.c
-./src/color-man.c
-./src/compat.c
-./src/dnd.c
 ./src/dupe.c
 ./src/editors.c
 ./src/exif.c
 ./src/exif-common.c
 ./src/filelist.c
-./src/format_canon.c
-./src/format_fuji.c
-./src/format_nikon.c
-./src/format_olympus.c
-./src/format_raw.c
 ./src/fullscreen.c
-./src/globals.c
 ./src/histogram.c
 ./src/image.c
-./src/image-load.c
 ./src/image-overlay.c
 ./src/img-view.c
 ./src/info.c
 ./src/layout.c
 ./src/layout_config.c
 ./src/layout_image.c
 ./src/layout_util.c
+./src/lirc.c
 ./src/main.c
-./src/md5-util.c
 ./src/menu.c
-./src/pan-calendar.c
-./src/pan-folder.c
-./src/pan-grid.c
-./src/pan-item.c
-./src/pan-timeline.c
-./src/pan-util.c
 ./src/pan-view.c
-./src/pixbuf-renderer.c
-./src/pixbuf_util.c
 ./src/preferences.c
 ./src/print.c
 ./src/rcfile.c
-./src/remote.c
 ./src/search.c
 ./src/secure_save.c
-./src/similar.c
-./src/slideshow.c
 ./src/thumb.c
-./src/thumb_standard.c
 ./src/ui_bookmark.c
-./src/ui_fileops.c
 ./src/ui_help.c
-./src/ui_menu.c
-./src/ui_misc.c
 ./src/ui_pathsel.c
-./src/ui_spinner.c
 ./src/ui_tabcomp.c
-./src/ui_tree_edit.c
-./src/ui_utildlg.c
 ./src/utilops.c
 ./src/view_dir.c
-./src/view_dir_list.c
-./src/view_dir_tree.c
 ./src/view_file_icon.c
 ./src/view_file_list.c