Released v1.3.0

• Fixed: (BUG::CRITICAL) utt_T_DeleteTaskGroup() CRASH if invoked right after utt_T_CreateTaskGroup(): uninitialized p_grp->prev_nxd and p_grp->next pointers.
• Fixed: (BUG) xxx_DeleteTaskGroup(): a group with uninitialized GroupID was pushed to deleted group list if invoked right after utt_T_CreateTaskGroup().
• Fixed: (BUG) utt_T_CreateTaskGroup(): missing call to leave_sig_critical_section() if deleted group list is empty.