Fixed default logo path
Added a basic history system

This allows for a powerful back button.  Generally, this improves
functionality, UX, and code cleanliness of anyplace where two views
should be in a reversable sequence that's not necessarily known beforehand.
Added the new BackButton to model views/lists

Also refactored the create method for lists a bit.  There is a bug in
Enyo where kind properties that are arrays (or objects) are shared by
all instances of that kind that the refactor works around.  It also
switches the create method to the more performant enyo.inherit
overriding syntax.
Fixed an issue with relational pickers

Particularly, it fixes an issue where a relational picker has no model.
Before, this would cause an error to be thrown.
Added a few additional input types

Namely, Number and Date
Working search widget