Fix handling of multi line title and description

[cyberixae]

This pull request fixes #79 by generating a separate line comment for each line of JSON schema title and description. This approach has the benefit that existing non-multi-line conversions won't change as a result.

[cyberixae]

The solution suggested in pull request #80 attempts to solve the problem by use of multi line comments /* comment */. While this would work for line-endings it creates a new problem for descriptions containing */ that might prematurely end the multi-line comment.