Use ruby gems not gem cutter

Signed-off-by: Gordon B. Isnor <gordonbisnor@gmail.com>
Update bundler version in gemspec

Signed-off-by: Gordon B. Isnor <gordonbisnor@gmail.com>
Test for unflag should remove flaggings

Signed-off-by: Gordon B. Isnor <gordonbisnor@gmail.com>