Add some more tests around COPY failure scenarios.
Add a test for COPY from a stream object.
Rely on autoClose
Only run stream tests on node 0.10.
Add test for trying to copy a non existing file.
Fix error message assertion.
Use Error objects when throwing something.
Generate better error message in CopyFail.
Use custom error types for Query error handling.
Use custom error types for connection errors.
Fix error type name
Better test for authentication errors.
Use actual code for authentication errors
Merge pull request #31 from wvanbergen/add_copy_tests

Better error handling and test coverage