Normalization Preview Component

## What
This component adds an AJAX component which provides on-the-fly previews of metadata normalization. 

## Installation
Edit httpd-recman-preview.conf to reflect the correct directory and link/copy it into Apache.

## Usage
### Example
    http://localhost/preview?format=MyDriver&data=<my><meta><data></data></meta></my>

### Mandatory arguments:
* data: the XML metadata to process. In real use cases, should be sent as a POST parameter to bypass URL length limitations
* format: the Record Driver to process the metadata with

### Optional arguments:
* source: the Data Source id to read settings from

### Returns 
An JSON array of normalized index fields.