chore(): npm release script for router artifacts.

Closes #5171

modules/angular2/src/router/package.json

@@ -0,0 +1,4 @@
+{
+  "name": "@angular/router",
+  "version": "0.0.1"
+}

scripts/publish/npm_publish_router.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+set -ex
+shopt -s extglob
+
+ROOT_DIR=$(cd $(dirname $0)/../..; pwd)
+cd ${ROOT_DIR}
+
+gulp clean
+gulp build.js buildRouter.dev
+
+NPM_DIR=${ROOT_DIR}/dist/npm
+rm -fr ${NPM_DIR}
+FILES='!(test|e2e_test|docs)'
+DTS_FILES='*.d.ts'
+
+NAME=router
+PUBLISH_DIR=${NPM_DIR}/${NAME}
+
+# Clean the publish directory. This is the root directory for npm publish.
+rm -fr ${PUBLISH_DIR}
+mkdir -p ${PUBLISH_DIR}
+
+# Copy package.json that contains the (scoped) package name and version.
+cp ${ROOT_DIR}/modules/angular2/src/router/package.json ${PUBLISH_DIR}
+
+# Create directory for the separate framework versions
+mkdir -p ${PUBLISH_DIR}/angular1
+mkdir -p ${PUBLISH_DIR}/angular2
+
+# Copy router build artifacts to the publish directory.
+cp ${ROOT_DIR}/dist/angular_1_router.js ${PUBLISH_DIR}/angular1/
+cp ${ROOT_DIR}/modules/angular1_router/src/ng_route_shim.js ${PUBLISH_DIR}/angular1/
+
+cp ${ROOT_DIR}/dist/js/bundle/router* ${PUBLISH_DIR}/angular2/
+
+# Remove any dart related files
+rm -f ${PUBLISH_DIR}/{,**/}{*.dart,*.dart.md}
+
+# Actually publish to npm
+npm publish ${PUBLISH_DIR} --tag pre-release --access public