[Process] Now caches ProcessResult
[Process] Now caches ProcessResult

OLD
- Calling .is_finished() followed by .finish() could give incorrect result

NEW
- ProcessResult object is cached as a property.

Plasmaworks/Rogue,Plasmaworks/Rogue,Plasmaworks/Rogue,AbePralle/Rogue,Plasmaworks/Rogue,AbePralle/Rogue