YouTube Service Implementation

In this PR:

Implemented YouTube provider service that wraps:
    - YouTube Player Service
    - YouTube Search Service

Added `_.lodash`

Please review :eyes: @alexmckenley @malucky @ssalazars
we need to be using a minification safe approach for injecting things per the style guide: https://github.com/johnpapa/angularjs-styleguide#manual-dependency-injection