Added Component to aid with quickly exporting the results of complex model find('all') calls

Hi, I hacked together a component to quickly export Model find results with one line (https://github.com/joshuapaling/CakePHP-Export-CSV-Plugin). Then, I saw your plugin.

So, I've added a component to your plugin to help with easily exporting CSV data for complex find calls (eg, with many columns, or with multiple deep-nested belongsTo associations), so you don't have to explicitly specify the $_header and $_extract variables - you can auto-generate sensible ones, and customise where needed.

The component has 100% test coverage and is documented in the ReadMe.

Let me know if you have any Q's, and thanks for another great plugin!