Implement basic Korean support

[raccoonyy]

Hello. I implemented basic Korean support for proofreading Korean. I referred to #568 and added Korean morphological analyzer Komoran as a dependency.

This P.R. based on @nacyot's #784 .

[takahi-i]

👍

[coveralls]

Coverage increased (+0.02%) to 91.403% when pulling 88db405 on raccoonyy:korean into 42a24bc on redpen-cc:master.

[takahi-i]

@raccoonyy Thank you very much for the valuable contributeion! I will look into the changes.

[raccoonyy]

@takahi-i Is there anything I can help?

[takahi-i]

Deeply sorry for the late response... I will review this PR this weekend.

[raccoonyy]

Thanks! 👍

[takahi-i]

I looked into the changes and confirmed the changes are great! Before the merge, is it possible to add the sample documents in several formats (such as markdown or asciidoc) 🙏 ?

The following is the directory of the samples, just we add the files (under ko) , which are copied into the final package and we can try redpen with the added sample documents.

https://github.com/redpen-cc/redpen/tree/master/redpen-cli/sample/sample-doc

[raccoonyy]

I will add the docs soon. Thanks. :)

[raccoonyy]

@takahi-i I added sample documents. I'm really sorry for the late.

[takahi-i]

Thank you very much @raccoonyy ! I will look into the changes this weekend.

[takahi-i]

LGTM. Can you grant these changes under the Apache License 2.0 @raccoonyy?

[raccoonyy]

@takahi-i Yes I do. :)

Do I have to modify the docs to grant Apache License 2.0?

[takahi-i]

Thank you for the agreement @raccoonyy!

Do I have to modify the docs to grant Apache License 2.0?

Nothing. We just confirm it when large feature is proposed.

Thank you very much for the consistent work!