Just a post to keep track of the spanish translation so far.

Translation status:

• GLOSSARY.md
• LICENSE.md
• README.md
• SUMMARY.md
• design_process.md
• distribution.md
• economies.md
• introduction.md
• licenses.md
• motivation.md
• proposition.md
• this_book.md

Proof read status

• GLOSSARY.md
• LICENSE.md
• README.md
• SUMMARY.md
• design_process.md
• distribution.md
• economies.md
• introduction.md
• licenses.md
• motivation.md
• proposition.md
• this_book.md