Update INSTALL and README.md with missing instructions.
Updated automake, Makefile(s), and config/configure scripts.
Add libtool script from /usr/share/libtool/.
Add scripts in autom4te directory.
Update parser.c to fix missing typedefs due to Bison version changing from 2.3
to 2.5.
Add changes to parser.h header file due to Bison version change from 2.3 to
2.5.

  * FIXME There is still a missing typedef for the pxpathPtr struct.
Update scanner.c due to previously mentioned Bison version bump.
Update y.tab.[ch] due to Bison version bump.