Include BASE_DIR in * imports from pack module
Implemented batch-collection functions
Added example code using batch
Reduced number of processes for bach() example to 8
Fixed docstrings for fetch_and_zip example module
Merge branch 'develop' into feature/parallelism
Fixed batch example to work with Python 3
Refactored process_images() and made it easier to do stuff concurrently
Merge branch 'feature/parallelism' into develop