Version 4.0.0 - Initial Open Source Release

This is the initial open source release of the mParticle kit implementations, and it's tied to release 4.0.0 of the core mParticle SDK. Highlights of this release from the previous 3.x release are:

• Support for Localytics
• Support for Flurry
• Support for choosing which kits you'd like to include in your app, or none at all
• Removal of the previously-deprecated MPProduct class and related APIs, check out our shiny new enhanced eCommerce APIs here: http://docs.mparticle.com/#ecommerce