Computation Spaces: spaces

Field	Mutable	Type	Explanation
`created`	no	`Int`	Number of computation spaces created by `Space.new`.
`cloned`	no	`Int`	Number of computation spaces cloned by `Space.clone`.
`committed`	no	`Int`	Number of computation spaces committed by `Space.commit`.
`failed`	no	`Int`	Number of failed computation spaces.
`succeeded`	no	`Int`	Number of succeeded computation spaces.