HOTFIX: Add flexslider library to make file

## Ready State: Yes
Addition of the flexslider library from woothemes github.  Required for slider functionality.
Related to the following Jira Ticket:  https://imagex.atlassian.net/browse/PUA-17

## Requirements & Dependencies

* flexslider module

## Deployment Instructions

* Merge code.

## Usage/Test Instructions

* Ensure on build, that the latest woothemes version of flexslider is downloaded to the libraries folder.
* Visually view the changes on the homepage.