Also flex is now optional.
The outputs of flex and bison are now committed. By default they get
built, but users who want to build from git can now
./configure --disable-maintainer-mode
to turn off the dependency on bison and flex.
Maintainers must, of course, commit the bison and/or flex outputs when
they make changes to parser.y and/or lexer.l, respectively.
- Re-remove VERSION file and all traces of it
- Pass a decent version indicator to AC_INIT (using git describe)
When we tag 1.4 this will produce 1.4 as the version string when
building on the HEAD of that tag.
