Fixes; Builtins; Testing in the interpreter

std/impl/array.ts

@@ -0,0 +1,17 @@
+/// <reference path="../../assembly.d.ts" />
+
+@global()
+class Array<T> {
+
+  length: i32;
+  readonly capacity: i32;
+  readonly data: usize;
+
+  constructor(capacity: i32) {
+    if (capacity < 0)
+      throw new RangeError("capacity out of bounds");
+    this.length = capacity;
+    this.capacity = capacity;
+    this.data = Memory.allocate(sizeof<T>() * capacity);
+  }
+}