Add Vala Book to External Resources

[Tbusk]

Description

The following book should be added to as an external resource on the site:

Name: Introducing Vala Programming: A Language and Techniques to Boost Productivity
Author: Michael Lauer
ISBN-13: 978-1484253793
ISBN-10: 1484253795

It is available on a few platforms including O'Reilly and Amazon:

• https://www.oreilly.com/library/view/introducing-vala-programming/9781484253809/
• https://www.amazon.com/Introducing-Vala-Programming-Techniques-Productivity/dp/1484253795

I recently stumbled upon this book, and gave it an order. Perhaps others would like to know about it's existence, and it does fall under the category of 'external resources'.

I'm thinking for now, a link should be sufficient. Or, if other books out there exist, maybe a book page should be created. Or a new page containing articles, publications, and books.

[colinkiama]

The O'Reily link to this book should be good enough for now. I think that when 3+ books are added then we can explore the idea of creating a "Books" section on the website.