Add hideandshowtools.js

Hide and Show tools is a mod that adds two tools: Hide tool, which you click on pixels to hide them, and Show tool, where you click on pixels to show them if they're hidden.

mods/hideandshowtools.js

@@ -0,0 +1,18 @@
+elements.hide = {
+	color: "#000000",
+    tool: function(pixel){
+        pixel.alpha = 0
+    },
+	category: "tools",
+	canPlace: false,
+	desc: "Use on pixels to hide them.",
+};
+elements.show = {
+    color: "#ffffff",
+    tool: function(pixel){
+        pixel.alpha = 1
+    },
+    category: "tools",
+    canPlace: false,
+    desc: "Use on pixels to show them, can also unpaint elements."
+};