Sigel data transformation with dump and updates

* Morph base dump of Sigel data 
* Dowload and morph updates of Sigel data from Junge 2013 until now
* Let all data flow together with DBS data and morph everything
* Update location of Sigel data in project (no separate directory anymore since it is only one file now)
* Add method to process sample data only without loading updates from dnb (for Unit tests!)
* Update documentation (README.textile)