Allow deep clone if requested via `include` or `plus` with the `underscore` build.
Revert removing falsey guards.
Rebuild minified files and docs.
Cleanup build.js regexes.
Add unit tests for passing falsey values to `_.initial` and `_.rest`.
Update vendors.
Reduce `createIterator`.
Cleanup lodash.js.
Bump to v0.8.1.
Reduce lodash builds and cleanup README.md.
Simplify `createIterator`.
Add `_.isPlainObject` to the list of features in README.md. [ci skip]
Simplify how deep `_.clone` handles booleans.
Reduce deep `_.clone` array iteration and add `_.each` dependency.
Update Backbone/Underscore vendor folders.
Reduce Underscore build and update Underscore version number.
Update `_.map` to return an empty array when falsey values are passed.
Update DocDown and Underscore.
Update README.md to remove fixed Underscore issue.
Reduce lodash file size.