Fixed naming of Opauth.
Merge pull request #201 from uzyn/patch-1

Fixed naming of Opauth.
Add new book.
Add Zephir
Move Plum to the correct section
Merge pull request #218 from ThePixelDeveloper/patch-1

Move Plum to the correct section
Merge pull request #208 from wapmorgan/add-zephir

Add Zephir