added common fields to info hash

added two very common fields to the info-hash:
+ _name_ (simply concating first_name and last_name) 
+ _urls_ hash (adding the permalink with key "Website").
These fields are widely used by many other omniauth strategies (see my extensive research ;-) ), having those in the XING strategy just makes it a few seconds easier to use. Nothing much to write home about, but if you're in the mood to merge something small, this might suite your desires. 

![typical-info-fields-omniauth](https://f.cloud.github.com/assets/419801/614097/168e6344-ce15-11e2-845c-0bfbb95b9402.png)