update contributing, update bibliography
removed plain-mit-hilfe, redundant to golden-master
Merge commit '495228433ee61e5dd2a41fbec4d1f5facb8cd071'

* commit '495228433ee61e5dd2a41fbec4d1f5facb8cd071':
  issue #10 : the script is now a bit cleaner and generates three versions: plain, with-help and with-examples
  added some ignore files for netbeans
  not only remove arc42help but all arc42* tags to create plain template

Conflicts:
	.gitignore