Non-english chars in "jumpstart.yml" break the app

[dourosdimitris]

If for example the name is set to a greek one, the serializer raises error and the app cannot start with:

/rails/lib/jumpstart/lib/jumpstart/yaml_serializer.rb:14:in `match': invalid byte sequence in US-ASCII (ArgumentError) if (match = /^(\w+):\s*|-/.match(line))