A couple of things helpful for distro packaging

[hobbes1069]

I have just gotten this accepted into Fedora but there's a couple of things that would be nice:

1. Makefile support for DESTDIR, since for packaging packages are built and installed as a normal user.
2. Makefile support for compiler flags (CFLAGS/CXXFLAGS/LDFLAGS). I worked around this using a sed replace of -Wall with %{optflags}.

[cstrouse]

@hobbes1069 DESTDIR support was added to the Makefile.