Bulk Uploader objects & methods

Created a python objects to handle bulk uploader. A user can use the objects and methods to upload tasks in bulk. See following files:

examples/classmaprouletteloader.py
examples/bulk_process.py --> adapted process.py script
examples/loadertest.py
examples/example2.json

Tested methods with the loadertest.py script.

See commits:

947d661
cd1ee17