adding bulk task uploader, first pass
removing some debugging output, and bulk commit bug.
adding fetch all / change branch git tasks
Merge pull request #249 from osmlab/fabfile-add-branch-change

adding fetch all / change branch git tasks
Merge pull request #250 from osmlab/bulk-task-loader

Bulk task loader
Merge branch 'master' into feature-api-update-challenge

* master:
  adding fetch all / change branch git tasks
  removing some debugging output, and bulk commit bug.
  adding bulk task uploader, first pass