Add getppid on Windows
Merge branch 'master' of https://github.com/cpoulain/codalab-cli
Merge branch 'master' of https://github.com/codalab/codalab-cli
Merge pull request #20 from cpoulain/master

Add getppid on Windows.
Add support for worksheet directives
Merge pull request #21 from javierluraschi/WorksheetDirectives

Add support for worksheet directives
Merge branch 'master' of https://github.com/codalab/codalab-cli into dev