Added 5 micro libraries

Euclid
Recursive Euclidean algorithm for finding the greatest common divisor of two numbers.
https://github.com/daniellmb/Euclids-algorithm

VidBG
micro-library for embedding video backgrounds into web pages
https://github.com/daniellmb/Euclids-algorithm

AOP.js
Aspect Oriented Programming Micro Library.
https://github.com/daniellmb/aop.js

DI.js
Dependency Injection Micro Library.
https://github.com/daniellmb/di.js

AB.js
A/B/n Testing Micro Library.
https://github.com/daniellmb/ab.js