Make Woo tables separate from post and postmeta

WooCommerce needs to take this forward and separate the woo data from post and post meta. Rather than storing product meta in row-wise, it should come up with the solution of column-wise data store. It’s really hard to manage big eCommerce websites in the existing table and data storing structure of WooCommerce.

For the case of easily manageable meta-data of products, provide the facilty of adding columns in a table just like Magento does.