Log Message:
Update to 1.0.13:

Adam Jackson (1):
      Fix build with gcc -Werror=format-security

Alan Coopersmith (6):
      configure: Drop AM_MAINTAINER_MODE
      autogen.sh: Honor NOCONFIGURE=1
      Use autoconf HAVE_UNISTD_H instead of imake X_NOT_POSIX to find \ 
<unistd.h>
      Just use C89 size_t instead of rolling our own Size_t
      Use SEEK_* names instead of raw numbers for fseek whence argument
      libXaw 1.0.13

Gaetan Nadon (2):
      Makefile: use AM_V_GEN and AM_V_at to implement automake silent rules
      Makefile: use $(LN_S) for better code portability

Jon TURNEY (1):
      Include <unistd.h>

Thomas Klausner (1):
      Fix abs() usage.