THIS IS A PREMATURE COMMIT.

I don't consider this commit finished because
although I made a start with incrementing the version,
the testing mentioned in the README wasn't done.
The reason it wasn't done is because libcwd fails
to decode DWARF version 4 correctly and I didn't
fix that until now.

Nevertheless, this is what I personally use at the moment:
I just configure with --disable-alloc --disable-location
Alternatively you can tell your compiler to use dwarf version 2.