fix scheme and fortran

- Scheme failed for me: on Raring VM via Vagrant, gauche doesn't run.
  Now I installed Guile, and it runs.
- Fortran failed because f2c was missing. A later error was because
  tcc was missing. Now they are both installed by bootstrap.sh.
- README.md now says these have been fixed.
- apt-get update is followed by apt-get upgrade, and why not?
  The bootstrap script spends an eternity downloading languages anyway.
- Some whitespace fixes too.