Add node modules and new code for release (#57)

Co-authored-by: taakleton <taakleton@users.noreply.github.com>

node_modules/underscore/cjs/partition.js

@@ -0,0 +1,9 @@
+var _group = require('./_group.js');
+
+// Split a collection into two arrays: one whose elements all pass the given
+// truth test, and one whose elements all do not pass the truth test.
+var partition = _group(function(result, value, pass) {
+  result[pass ? 0 : 1].push(value);
+}, true);
+
+module.exports = partition;