changed to add typings install on build script

Author: abner

package.json

@@ -7,7 +7,7 @@
     "main": "src/java_process.ts"
   },
   "scripts": {
-    "build": "tsc",
+    "build": "typings install && tsc",
     "jasmine": "jasmine",
     "test": "npm run build && istanbul cover --include-all-sources jasmine  && npm run remap-cov",
     "build_test": "npm run build && npm run test",