Added Gulp.js for compiling SCSS stylesheets

node_modules/ext/promise/limit.js

@@ -0,0 +1,62 @@
+"use strict";
+
+var ensureNaturalNumber  = require("type/natural-number/ensure")
+  , ensurePlainFunction  = require("type/plain-function/ensure")
+  , ensure               = require("type/ensure")
+  , defineFunctionLength = require("../lib/private/define-function-length");
+
+module.exports = function (limit, callback) {
+	limit = ensure(
+		["limit", limit, ensureNaturalNumber, { min: 1 }],
+		["callback", callback, ensurePlainFunction]
+	)[0];
+
+	var Promise = this, ongoingCount = 0, pending = [];
+	var onSuccess, onFailure;
+
+	var release = function () {
+		--ongoingCount;
+		if (ongoingCount >= limit) return;
+		var next = pending.shift();
+		if (!next) return;
+		++ongoingCount;
+		try {
+			next.resolve(
+				Promise.resolve(callback.apply(next.context, next.arguments)).then(
+					onSuccess, onFailure
+				)
+			);
+		} catch (exception) {
+			release();
+			next.reject(exception);
+		}
+	};
+
+	onSuccess = function (value) {
+		release();
+		return value;
+	};
+
+	onFailure = function (exception) {
+		release();
+		throw exception;
+	};
+
+	return defineFunctionLength(callback.length, function () {
+		if (ongoingCount >= limit) {
+			var context = this, args = arguments;
+			return new Promise(function (resolve, reject) {
+				pending.push({
+					context: context,
+					arguments: args,
+					resolve: resolve,
+					reject: reject
+				});
+			});
+		}
+		++ongoingCount;
+		try {
+			return Promise.resolve(callback.apply(this, arguments)).then(onSuccess, onFailure);
+		} catch (exception) { return onFailure(exception); }
+	});
+};