Revert 341c79b..2aab6f4

This rolls back to commit 341c79b5dfcdc413b2ca013986ce494af6ba57a9.
Merge branch 'master' of https://github.com/denssle/ruby

Conflicts:
	Bibliothek/employer.rb
	Bibliothek/loan.rb
	Bibliothek/person.rb
	Bibliothek/prog.rb
Merge branch 'master' of https://github.com/denssle/ruby

Conflicts:
	Bibliothek/employer.rb
	Bibliothek/loan.rb
	Bibliothek/person.rb
	Bibliothek/prog.rb