Adding route definition to example

[jskulski]

This tripped me up a bit, so thought explicitly stating the order of decorators could help.

This works (404s):

@app.route('/feature-flag-test-route')
@is_active_feature('test_route')
def feature_flag_test_route():
    return 'on!'

This does not (returns 200, displays 'on!')

@is_active_feature('test_route')
@app.route('/feature-flag-test-route')
def feature_flag_test_route():
    return 'on!'

[jskulski]

Closing for inactivity. Feel free to reopen :)