Add copy command support.
Extended UNLOAD and COPY commands
some fixes, update version number to 0.5
Set version number to 0.5.0a to mark it as beta
Fix tests for CopyCommand / UnloadCommand
Merge pull request #1 from robertengel/master

Extend redshift_sqlalchemy by UNLOAD and COPY support
More options for UnloadCommand and more resilient test cases
Add MANIFEST option to CopyCommand
Merge pull request #22 from robertengel/extended_unload_and_copy_commands

Extended unload and copy commands