Send segmented SMS as seperated SMS, and handle received SMS based on network type
Fix size calculation of user data header decoder
Support send long message
Support special chars in 7-bit ASCII encoding

1. For 0x00 ~ 0x20 in 7-bit ASCII encoding, it uses definition
   from GSM 7-bit default alphabet instead of standard 7-bit ASCII
Support special chars in 7-bit ASCII encoding

1. For 0x00 ~ 0x20 in 7-bit ASCII encoding, it uses definition
   from GSM 7-bit default alphabet instead of standard 7-bit ASCII