Make --lock default to True. Add --nolock to provide lockless functionality when needed
Make nolock default when using luigi.build
Renames flag to --no-lock and adds warning when --lock is used
Makes getpcmd and thereby process locking MacOSX-compatible
Adding my local Vagrant bits to gitignore
Adding a target and external task for EMR output stored on S3
Fixed bugs in hive.py
Merge pull request #316 from spotify/freider/lock_by_default

Use process locking by default when running on command line
Merge pull request #324 from bstempi/feature/S3EmrTarget

Feature/s3 emr target
Merge pull request #326 from actsasgeek/fix-hive-module

Fixed bugs in hive.py
Merge branch 'master' into flatten-strings