Synchronize / proxy access to properties.

[MRazvan]

Allow properties to be proxied over and allow synchronized access to them.

• For numbers we could use shared buffers, fastest way, smallest performance impact.

• For other data we need to lock the property, send the update to all workers / main, and after that unlock the property access, this will incur a huge performance penalty, especially since the messages for update are part of a queue, even if they are assigned to the worker directly, the worker must finish what it's doing and then process the message, also this must be orchestrated in such a way as to know when all workers / and main have been updated.

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For now number properties would be the simplest / fastest choice since we have support in Atomics for that.