1.0.0 Pre-release (Beta 3)

• Add wrapper methods for REST API (try: datadotworld.api_client())
• Introduce support for datapackages (try: datadotworld.load_dataset())
• Refactor query functions (try: datadotworld.query())
• Consolidate package interface (simply import datadotworld, no need to instantiate DataDotWorld)
• Introduce unit tests
• Introduce configuration tool (try: $ dw configure)