Fix up the pdlua-meta.pd file, and make sure that it gets installed.

Also added a tutorial-meta.pd file for the tutorial which deserves its
own PDDP meta information.

This is mostly for the benefit of Pd flavors supporting the (old) PDDP
standard (Pd-extended and its derivatives). Purr Data, specifically,
will use the descriptions in the meta files in its help browser to
automatically provide helpful descriptions when bookmarking directories
with help patches. (In fact this works with *any* directory dir
containing a dir-meta.pd file with the usual PDDP meta data in it.)

Makefile

@@ -56,4 +56,5 @@ pdx_files = $(addprefix ./pdlua/tutorial/examples/, pdx.lua pd-remote.el pd-remo
 installplus:
 	$(INSTALL_DIR) -v "$(installpath)"
 	cp -r ./pdlua/ "${installpath}"/pdlua
+	cp pdlua-meta.pd "${installpath}"
 	cp $(pdx_files) "${installpath}"

pdlua-meta.pd

@@ -1,10 +1,10 @@
-#N canvas 10 38 200 201 10;
-#N canvas 359 186 421 302 META 0;
-#X text 10 10 META this is a prototype of a libdir meta file;
-#X text 10 30 NAME pdlua;
-#X text 10 50 LICENSE GNU GPL;
-#X text 10 70 DESCRIPTION lua loader for pd;
+#N canvas 2 51 320 90 10;
+#N canvas 2 51 382 154 META 0;
+#X text 10 10 NAME pdlua;
+#X text 10 30 LICENSE GPL-2+;
+#X text 10 50 DESCRIPTION write your own Pd objects in the Lua programming language;
 #X text 10 90 AUTHOR Claude Heiland-Allen \, Frank Barknecht \, Martin
-Peach \, IOhannes m zmölnig \, Albert Gräf;
+Peach \, IOhannes m zmölnig \, Albert Gräf \, et al;
 #X text 10 123 VERSION 0.12.14;
-#X restore 10 20 pd META;
+#X restore 43 36 pd META;
+#X text 39 15 pdlua: Loader for Lua objects;

pdlua/tutorial/tutorial-meta.pd

@@ -0,0 +1,8 @@
+#N canvas 2 51 320 90 10;
+#N canvas 2 51 382 154 META 0;
+#X text 10 10 NAME pdlua-tutorial;
+#X text 10 30 LICENSE CC BY-SA 4.0;
+#X text 10 50 DESCRIPTION The pdlua tutorial \, with examples;
+#X text 10 70 AUTHOR Albert Gräf;
+#X restore 43 36 pd META;
+#X text 39 15 The pdlua tutorial \, with examples;