Core: README File

## Ready State: YES
Added README
NOTE:  did not list core items as dependencies (text, link, taxonomy)  , or include anything in make file as there seemed no specific make items for common fields.

## Requirements & Dependencies
* features

## Deployment Instructions
* Merge code.

## Usage/Test Instructions

* Confirm README has been updated, is correct and Drupal make file has been added (currently empty)