Introduce Startpage

At the moment you get rerouted to members/me after login. Please introduce a startpage. View to be implemented:
- Welcome: Display "Welcome Firstname Lastname (Club)"
- News: Important Messages that can be definied as Site Administrator

![mockup](https://f.cloud.github.com/assets/3237729/150418/9dbfbcdc-7550-11e2-8ef0-387586118c92.png)