Added merge_module function. Added text module (currently having encoding only). Updated the FileSystem File object with readText, writeText methods (removed the FileReader, FileWriter classes).

Utils/module_merge.ts

@@ -0,0 +1,7 @@
+// This method iterates all the keys in the source exports object and copies them to the destination exports one.
+// Note: the method will not check for naming collisions and will override any already existing entries in the destination exports.
+export var merge = function (sourceExports: any, destExports: any) {
+    for (var key in sourceExports) {
+        destExports[key] = sourceExports[key];
+    }
+}