Main Program

* moved the frozen and get_path function out into a
  separate file

Signed-off-by: Michael Diener <dm.menthos@gmail.com>
Main Program

* fixed a bug in the management class

Signed-off-by: Michael Diener <dm.menthos@gmail.com>
Main Program

* use consistently the copytree frunction from shutil

Signed-off-by: Michael Diener <dm.menthos@gmail.com>
Main Program

* added new error class FolderNotWritableError
* added basic update mechanics (overwrites files!)

Signed-off-by: Michael Diener <dm.menthos@gmail.com>
increased version