sgio/__init__.py: import all symbols from sgio

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
TESTS: move the tests to a directory directly under the repository root

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
TESTS: add a makefile so we can run all tests easily

Add tests/Makefile to handle all cdb and unmarshalling tests.
This makes it easy to re-run all tests after any changes has been made
to ensure that all is good before we commit the changes.

These tests all run on the current code in the source directory.
To run the tests:

cd tests
make

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Merge pull request #43 from sahlberg/test

make  Tests a seperate package