dummy commit
Revert "dummy commit" to simplify upcoming merge.

This reverts commit 2d90e7d7ad22a1152b11ed8cd1c8747182e9bf91.
Merge branch 'skel'
Make the main() function more robust.
Make $(OBJDIR) an order-only prerequisite.
Fix makefile and do some cleanup.
Pass the stream as first argument, as in fprintf(3) and fscanf(3).
fixed wrong format of example