Change don't create a backup from an initial zero byte main database file, PEP8 and code tidy up.
Change move the previous InitialSchema into migration_tests to preserve migration development.
This fix correctly places the local libraries at the start of the sys.path such that they are loaded instead of any libraries that may already exist on the users system. This prevents the issue where a system library that isn't supported by SickGear is loaded and causes errors during operation.
