We don't need to check for stddef.h if we have a good C++11 compiler. Anyone with a good C++11 compiler and no stddef.h deserves what they get.
Don't hard-code the C++ standard library into Makefile.am, since we
could link against clang's libc++ (and do by default on MacOS X).
Moved all compiler flags from Makefile.am to configure.ac.
Adjustments to make configure.ac less messy. Flags are now handled
systematically and deduplicated.
We figured out the unique_ptr problem with clang, no need to cat the
header anymore.
Added missing m4 macro, caught by Travis.
Removed remaining cruft from old Makefile.
Cosmetic.
Refactoring. Don't let ICU set any optimizaton flags, that's for us to
do.
Cleanup.
Cosmetic.
Make sure we don't stomp $out and $flags in case they happen to be in
use when our macos are called.
Commented out some diagnostic stuff.
Added 'foreign' to AM_INIT_AUTOMAKE, which means we're not required to
have AUTHORS, NEWS, or README.
Merge branch 'master' of github.com:jonstewart/liblightgrep

Conflicts:
	configure.ac
Merge branch 'master' of github.com:uckelman/liblightgrep
If bison is installed, print out the version. We don't yet check for a requisite version number, but this is at least a start.