refactor(Start Script writing): Write all scripts with ISO 8859_1 as this is compatible with both Windows and Linux. Templates are still read using UTF-8.

test: Use instance for unit tests

See merge request !299

ci: Do not include untracked files in build artifacts as they would fill up our servers harddrive....

refactor(API): Open certain methods to public to allow more usage out of ServerPackCreator. Overload API methods for ease of use.