split signs_lib from homedecor, put them into their own separate mods

package the two together as a modpack so that regular homedecor users don't
see a functional change, but others can take signs_lib and use it as a
standalone mod.

also get rid of some *~ files

README

@@ -1,6 +1,11 @@
 This is what I consider to be a fairly feature-filled home decor mod.  
-It supplies a bunch of stuff found in most homes, like flower pots, home 
-electronics, brass and wrought-iron tables, and lots more!
+
+It comes in two parts: The actual homedecor mod, which supplies a bunch 
+of stuff found in most homes (like flower pots, home electronics, brass 
+and wrought-iron tables, and a bunch of other things), and a signs 
+library forked from the one that thexyz and PilzAdam first made, which 
+produces visible text on signs (and which has been extended to put signs 
+on fences, including the brass and wrought iron ones here in homedecor).
 
 All items can be accessed either by crafting various other items 
 together, or with the usual /give commands.  To get a list of the actual 

homedecor/depends.txt

@@ -0,0 +1,2 @@
+default
+signs_lib

homedecor/fences.lua

@@ -439,8 +439,5 @@ minetest.register_node("homedecor:fence_chainlink_corner", {
 	},
 })
 
-minetest.register_alias("homedecor:fence_wood_with_sign", "signs:sign_post")
-
-homedecor.register_fence_with_sign("default:fence_wood", "signs:sign_post")
-homedecor.register_fence_with_sign("homedecor:fence_brass", "homedecor:fence_brass_with_sign")
-homedecor.register_fence_with_sign("homedecor:fence_wrought_iron", "homedecor:fence_wrought_iron_with_sign")
+signs_lib.register_fence_with_sign("homedecor:fence_brass", "homedecor:fence_brass_with_sign")
+signs_lib.register_fence_with_sign("homedecor:fence_wrought_iron", "homedecor:fence_wrought_iron_with_sign")

homedecor/init.lua

@@ -13,7 +13,6 @@
 
 homedecor = {}
 
-homedecor.disable_signs = minetest.setting_getbool("homedecor.disable_signs")
 homedecor.debug = 0
 
 homedecor.modpath = minetest.get_modpath("homedecor")
@@ -74,8 +73,6 @@ dofile(homedecor.modpath.."/slopes.lua")
 dofile(homedecor.modpath.."/door_models.lua")
 dofile(homedecor.modpath.."/doors_and_gates.lua")
 
-dofile(homedecor.modpath.."/signs_lib.lua")
-
 dofile(homedecor.modpath.."/fences.lua")
 
 dofile(homedecor.modpath.."/lighting.lua")