Realtime Normalization Preview feature

## What
This patch adds a Record Action which provides on-the-fly normalization and template-mapped display of XML metadata. Uses a configurable normalization provider (RecordManager and mock implementations provided)

## Configuration
Use this parameter in config.ini to setup RecordManager based previews.

    [NormalizationService]
    url = http://localhost/preview

## Usage
http://localhost/vufind/Record/*/Preview
##### POST/GET Arguments:
* **data** The XML metadata to process.
* **format** The metadata format.
* **source** The data source id to parse against.

All the arguments are passed on to the normalization provider.

## Example
![Realtime Normalization Preview](http://oi46.tinypic.com/242wuj5.jpg)