expanded when checking whether there are enough characters on the line
to decrement expanded by 2. This fixes the problem reported by fonseca
where the linked text was offset from the URI when there were backspaces
earlier on the line.
Ditch the building of an archive (.a) in favour of linking all objects in a
directory into a lib.o file. This makes it easy to link in subdirectories
and more importantly keeps the build logic in the local subdirectories.
Note: after updating you will have to rm **/*.a if you do not make clean
before updating.
