Optimize `_.isArguments` and cleanup `_.isArray` and `_.isRegExp`.
Ensure `_.flatten` will flatten `arguments` objects.
Adjust method dependencies for `_.flatten`, `_.uniq`, and `_.union`.
Update `underscore` build `_.defaults` and `_.result` to match Underscore v1.5.0.
Update `_.after` to be in sync with Underscore v1.5.0.
Update dependencies and make the `underscore` build pass more Underscore v1.5.0 unit tests.
Update vendor/underscore to v1.5.0.
Cleanup `matchProp` and `removeProp` in build.js.
Update builds and docs.
Quote Node.js versions in travis.yml
Fix typo of `matchProp` to `matchVar` in build.js.