Update version

Author: mhegazy

package.json

@@ -2,7 +2,7 @@
     "name": "typescript",
     "author": "Microsoft Corp.",
     "homepage": "http://typescriptlang.org/",
-    "version": "2.1.4",
+    "version": "2.1.5",
     "license": "Apache-2.0",
     "description": "TypeScript is a language for application scale JavaScript development",
     "keywords": [

src/compiler/core.ts

@@ -3,7 +3,7 @@
 
 namespace ts {
     /** The version of the TypeScript compiler release */
-    export const version = "2.1.4";
+    export const version = "2.1.5";
 }
 
 /* @internal */
@@ -1201,7 +1201,7 @@ namespace ts {
         if (b === undefined) return Comparison.GreaterThan;
         if (ignoreCase) {
             if (collator && String.prototype.localeCompare) {
-                // accent means a ≠ b, a ≠ á, a = A
+                // accent means a ? b, a ? a´, a = A
                 const result = a.localeCompare(b, /*locales*/ undefined, { usage: "sort", sensitivity: "accent" });
                 return result < 0 ? Comparison.LessThan : result > 0 ? Comparison.GreaterThan : Comparison.EqualTo;
             }