Fix issues with calling methods on property returns

- Resolves MerlinVR#97

Fix attributes on properties

Merge pull request MerlinVR#87 from MerlinVR/variable-callbacks

Variable callbacks

Add handling for DisableInteractive

Merge pull request MerlinVR#84 from MerlinVR/sync-beta

Sync beta -> Master

Mark UdonSharpEditorCache as public and clean up API for getting info

- Requested by Orels to mark the class public

Mark UdonSharpEditorCache as public and clean up API for getting info

- Requested by Orels to mark the class public

Mark UdonSharpEditorCache as public and clean up API for getting info

- Requested by Orels to mark the class public

Merge pull request MerlinVR#78 from MerlinVR/open-beta-custom-event-d…

…elayed

Add SendCustomEventDelayed support

Merge pull request MerlinVR#77 from MerlinVR/open-beta-events

Open beta events -> Master