Biggy.Droid, Biggy.WP8, and two sample projects

I created 3 projects

Biggy.Mobile that is the interface 

And the implementations are
Biggy.Droid
Biggy.WP8

I also add some preprocessor in IBiggy and IBiggyStore, in order to reuse the code, the only implementations that were needed were BiggyList and JsonStore.

Since WP8 the only way that works with FileStorage is async I had to create a BiggyList I could put preprocessor ther too, but I think it was going to be kinda of messy.....

I also added two sample project using MVVMCross

Cheers!