* New: Add plugin headers for compatibility with future WooCommerce update checks
* New: Add .pot file for ease of translating the plugin
* Change: Do not show variation MSRP content if all variation prices are the
same as each other, and all MSRPs prices are the same as each other.
* Fix: Savings amount could show incorrect values if saving was greater than 1000
* Fix: Do not through deprecated warnings for prices on variations on WooCommerce 3.x
