automating the cert renewal process

automated with one exception:

If user has ntru installed other than in the default location this scipt will update all certs except ntru, ask the user to manually run ./configure --with-ntru=<install_path> --enable-certgen --enable-keygen. Then run this script a second time.

If user does not have ntru the message will still print however let user know that if they are not using ntru then they can ignore the message.