Problem: The shell scripts have no shebangs
Solution: Add to each the line: #!/usr/bin/sh
Merge pull request #6 from jemc/master

Problem: The shell scripts have no shebangs
Merge pull request #5 from sappo/master

Problem: There's no obvious way to figure out what a gsl file generates
Problem: shebang is not portable between system
Solution: use `#!/usr/bin/env sh` shebang which should be cross platform

* Also changed the generated comments, so it's more obvious where they
  originate from.
Problem: The shell scripts have no shebangs
Solution: Add to each the line: #!/usr/bin/sh
Problem: shebang is not portable between system
Solution: use `#!/usr/bin/env sh` shebang which should be cross platform

* Also changed the generated comments, so it's more obvious where they
  originate from.
Merge remote-tracking branch 'dev/master'