Add TypeScript declaration

lib/painless-config.d.ts

@@ -0,0 +1,9 @@
+declare let config: IPainlessConfig;
+declare module "painless-config" {
+    export default config;
+}
+
+interface IPainlessConfig {
+    get(name: string): string;
+    all(): Map<string, string>;
+}

package.json

@@ -1,8 +1,9 @@
 {
   "name": "painless-config",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "Low friction library for application configuration.",
   "main": "index.js",
+  "types": "./lib/painless-config.d.ts",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },