Completed translation of '20 unwind example' into Spanish. Close #312.
Completed translation of '01 Introduction to Week 6' into Spanish. Close #325.
Merge pull request #324 from puentesarrin/issue-312

Completed translation of '20 unwind example' into Spanish. Close #312.
Merge pull request #326 from puentesarrin/issue-325

Completed translation of '01 Introduction to Week 6' into Spanish. Close #325.