* configure.ac: - Set AM_CPPFLAGS to always include config.h as the first include file. Some .c files correctly included config.h before anything else. The majority of .c files got this wrong by including it after other header files, including it multiple times, or not including it at all. Including it in the AM_CPPFLAGS should solve these problems and keep future mistakes from happening in new source files. * Additionally, all instances of '#include "config.h"' were removed from the tree