Make custom groups auto extend new object - survey and expose them in survey add / update operation

1. Here is the spec in the direction of automating custom groups extend a new object http://wiki.civicrm.org/confluence/display/CRM/Extending+custom+groups+to+auto+support+new+object

2. Add relevant option groups that makes custom groups recognize survey object.

3. Fix survey add / update forms to expose custom fields extending survey object.