Use official file-saver package & update babel

Author: Philipp Alferov

.babelrc

@@ -0,0 +1,3 @@
+{
+  "presets": ["es2015"]
+}

package.json

@@ -22,12 +22,13 @@
   "homepage": "https://github.com/alferov/angular-file-saver",
   "dependencies": {
     "Blob.js": "git+https://github.com/alferov/Blob.js",
-    "FileSaver.js": "git+https://github.com/alferov/FileSaver.js"
+    "file-saver": "^1.3.2"
   },
   "devDependencies": {
     "angular": "^1.4.5",
     "angular-mocks": "^1.4.5",
-    "babel-core": "^5.8.25",
+    "babel-core": "^6.10.4",
+    "babel-preset-es2015": "^6.9.0",
     "browser-filesaver": "^1.0.0",
     "browser-sync": "^2.8.2",
     "eslint": "^1.3.1",