Log Message:
Update to 1.58:

1.58  Mon Mar  7 22:31:22 EST 2011
    - Fixed RT #48229, an uninitialized value when registering to the network
      but getting no answer from the phone.

1.57  Mon Mar  7 20:53:03 EST 2011
    - Fixed a bug in send_sms() that prevented it from working at all.
      The bug was introduced with the "assume_registered" option.
    - Fixed RT #57585. Thanks to Eric Kössldorfer for his patch and
      test case.
    - Added PDU<->latin1 conversion functions in Device::Gsm::Pdu
    - Note to self: first release from Australia!