Split the big "homedecor" mod into multiple sub-mods

Any of these new submods can be run without any other
components that were once part of the big "homedecor"
mod, other than homedecor_common and homedecor_i18n

Reduced dependencies where possible, but each submod still
has its various dependencies more or less the same as before,
i.e. some need basic_materials, others need unifieddyes,
some need building_blocks, and so on.

All of the stuff that used to be under homedecor/handlers
got moved to homedecor_common, as did any models and/or textures
that are used by more than one other homedecor component.

All the miscellaneous items that didn't warrant their own
mod ended up in homedecor_misc, which can also be thought
of as the remains of the original "homedecor" mod, renamed.

listnodes.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+echo "Node listing as of "`date` > nodes.txt
+
+for i in *.lua; do
+	echo -e "\nIn $i:\n" >> nodes.txt
+	cat $i | grep "minetest.register_node(" | \
+	sed "s/minetest.register_node(.homedecor:/homedecor:/; s/., {//" | \
+	sort  >> nodes.txt
+done
+
+less nodes.txt
+rm -f nodes.txt