Fix: Cannot reset value unless truthy

src/main.js

@@ -142,7 +142,7 @@ Formsy.Form = React.createClass({
   resetModel: function (data) {
     this.inputs.forEach(component => {
       var name = component.props.name;
-      if (data && data[name]) {
+      if (data && data.hasOwnProperty(name)) {
         component.setValue(data[name]);
       } else {
         component.resetValue();

tests/Formsy-spec.js

@@ -650,6 +650,30 @@ export default {
 
   },
 
+  'should be able to reset the form to empty values': function (test) {
+
+    const TestForm = React.createClass({
+      render() {
+        return (
+          <Formsy.Form>
+            <TestInput name="foo" value="42" type="checkbox" />
+            <button type="submit">Save</button>
+          </Formsy.Form>
+        );
+      }
+    });
+    const form = TestUtils.renderIntoDocument(<TestForm/>);
+    const input = TestUtils.findRenderedComponentWithType(form, TestInput);
+    const formsyForm = TestUtils.findRenderedComponentWithType(form, Formsy.Form);
+
+    formsyForm.reset({
+      foo: ''
+    });
+    test.equal(input.getValue(), '');
+    test.done();
+
+  },
+
   '.isChanged()': {
 
     'initially returns false': function (test) {