Feature/prevent new line strip

In my current project I needed to leave multiple new lines in translations to have proper text format in app. 
Example of issue:
Original text:
```
Some text\n\n next part
```
After converting and escaping I had:
```
Some text\\n next part
```
Two new lines were converted to one. I don't know if it is a bug or expected behaviour, so I have added option for command line `-N` for skipping new lines stripping during converting CSV to Strings or any other format.