Add devDependecnies

Author: danrevah

package.json

@@ -45,14 +45,17 @@
     "codelyzer": "~1.0.0-beta.3",
     "core-js": "^2.4.1",
     "coveralls": "^2.11.15",
+    "gulp": "^3.9.1",
     "gulp-clean": "^0.3.2",
+    "gulp-typescript": "^3.1.4",
     "jasmine-core": "2.4.1",
     "jasmine-spec-reporter": "2.5.0",
     "karma": "1.2.0",
     "karma-chrome-launcher": "^2.0.0",
     "karma-cli": "^1.0.1",
     "karma-jasmine": "^1.0.2",
     "karma-remap-istanbul": "^0.2.1",
+    "merge2": "^1.0.3",
     "rxjs": "5.0.0-beta.12",
     "ts-helpers": "^1.1.1",
     "ts-node": "1.2.1",