Introduced 11ty

Set new version based on all changes since last version change, which was 0.4.2.

Removed obsolete devDependencies, now only using 11ty and sass.

Update to package.json fields

- New sass version
- Update to project links
- Rearranged fields
- New commands for 'scripts' that include changes from branch testing-npm-scripts
- Added field 'private' to prevent publishing by mistake

Added configuration for 11ty to reflect previous behaviour from gulp.

- Moved source/templates/demo/data.json to source/screens/demo.json so it can be used
- Fixed demo template so it can use the data source
- Removed source/data/demo.json which was not used

.eleventy.js

@@ -0,0 +1,32 @@
+module.exports = function (eleventyConfig) {
+	eleventyConfig.setNunjucksEnvironmentOptions({
+		// throwOnUndefined: true,
+		trimBlocks: true
+	});
+
+	eleventyConfig.addGlobalData("permalink", () => {
+		return (data) => `${data.page.filePathStem}.${data.page.outputFileExtension}`;
+	});
+
+	eleventyConfig.addPassthroughCopy({"source/art/images": "art"});
+
+	eleventyConfig.addPassthroughCopy({"source/art/favicons/**/*.+(ico|png|svg)": "."});
+
+	eleventyConfig.addPassthroughCopy({"source/code/**/*.js": "js"});
+
+	eleventyConfig.addPassthroughCopy({"source/data/**/*.json": "json"});
+
+	eleventyConfig.addPassthroughCopy("vendor");
+
+	return {
+		dir: {
+			input: "source/screens",
+			output: "build",
+			includes: "../templates",
+			data: "../data"
+		},
+		markdownTemplateEngine: "njk",
+		htmlTemplateEngine: "njk",
+		templateFormats: ["html", "njk"]
+	}
+};