Merge pull request #6 from alex-ip/release-candidate-1.0.0

Release candidate 1.0.0
All code refactored into subdirectories
setup.py implemented for src directory
Files deleted following refactor
.pyc files removed
cube_util references replaced with agdc.cube_util and specific functions imported
NoneType bug fixed in tile class filter - None replaced with empty tuple as default value
Minor bugs fixed
Current scripts moved to bin directory and scripts entry added to
setup.py
requires entry added to setup.py
Bulk submit scripts moved to bin directory and added to setup.py
Incorrect paths fixed in setup.py
Merge branch 'release-candidate-1.0.0' of github.com:GeoscienceAustralia/agdc into release-candidate-1.0.0
Nonetype vs. Empty tuple bug fixed in src/abstract_ingester/ingest_db_wrapper.py