Log Message:
Update to 1.15

 * Remove references to kpathsea xmalloc, and enable non-GNU malloc
 * dvi.c: Fix long sleep interval in --follow
 * Remove support for the now dead libt1
 * special.c: Use <sys/wait.h>
 * color.c: Fix segfault at missing xcolor.sty
 * set.c: Added check for out of memory in libgd allocate
 * ft.c: Add warning for missing target_light hinting
 * dvipng.c: Use return value of fgets better