test_advanced_image_processing: Added test for generate_dictionary from advanced_image_processing. This fixes #135.
.gitignore: Added *.pyo and *.pyd files.
test_spams_sandbox: Added for testing the module spams_sandbox. This will address issues #130, #131, #132, #133, and #134.
__init__: Added test_spams_sandbox to __all__ and imported it as well.