Refactoring Android project-level and platform scripts to use Q.js

This eliminates the use of shelljs.exec's sync mode, which is the source
of the filehandle leaks that can cause EMFILE on OSX, and are
CPU-intensive everywhere.

Tested locally, needs poking before it gets released.

bin/node_modules/q/benchmark/scenarios.js

@@ -0,0 +1,36 @@
+"use strict";
+
+var Q = require("../q");
+
+suite("Chaining", function () {
+    var numberToChain = 1000;
+
+    bench("Chaining many already-fulfilled promises together", function (done) {
+        var currentPromise = Q();
+        for (var i = 0; i < numberToChain; ++i) {
+            currentPromise = currentPromise.then(function () {
+                return Q();
+            });
+        }
+
+        currentPromise.then(done);
+    });
+
+    bench("Chaining and then fulfilling the end of the chain", function (done) {
+        var deferred = Q.defer();
+
+        var currentPromise = deferred.promise;
+        for (var i = 0; i < numberToChain; ++i) {
+            (function () {
+                var promiseToReturn = currentPromise;
+                currentPromise = Q().then(function () {
+                    return promiseToReturn;
+                });
+            }());
+        }
+
+        currentPromise.then(done);
+
+        deferred.resolve();
+    });
+});