Bug fix release.

• Fixed Space restrict functionality.
• Added more unit tests.

flake8 Reformat Patch

• All source now flake8 compliant.

Bug fix release.

• Fixed erroneous type in error message when passing a primitive type to the Settings constructor.
• Fixed default value for restrict argument in Space constructor.

Hotfix for None value assignment.

This is a quick hotfix release for assigning None values to settings of non-primitive type.

Pre-release version - not fully tested

This version is a pre-release with some fixes to the proto-version that was initially committed.

Not for use in production.