fix(deps): freeze version of @angular/platform-server

Fixes #63

Author: marclaval

package.json

@@ -54,7 +54,7 @@
  "@angular/http": "v2.0.0-rc.3",
  "@angular/platform-browser": "v2.0.0-rc.3",
  "@angular/platform-browser-dynamic": "v2.0.0-rc.3",
- "@angular/platform-server": "^2.0.0-rc.3",
+ "@angular/platform-server": "v2.0.0-rc.3",
  "@angular/router-deprecated": "v2.0.0-rc.2",
  "hammerjs": "2.0.6",
  "react-native": "0.28.0",