Basic Pourover example broken

[ngopal]

It looks like the basic pourover example found at this url is broken with the latest underscore.js (1.7.0) and pourover.js.

Specifically, adding filters to a collection:

collection.addFilters([mythology_filter, gender_filter, hobbies_filter]);

returns: "Uncaught TypeError: undefined is not a function"

Update: I was able to reproduce the error in both chrome and firefox.

[jdalton]

The PR #14 would fix it. It's related to Underscore 1.7.0's breaking change to _.extend to iterate over own-properties only of source objects (aligns with Lo-Dash/ ES6 Object.assign).

[esmooov]

Fixed!