Enable async modelset + refactor of model creation#676

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alonre24 wants to merge 4 commits intomasterfrom

Async_model_set

Commits on Apr 9, 2021

Enable async modelset + refactor of model creation (draft)
alonre24
committed

Commits on Apr 10, 2021

Fix in rdb loading
alonre24
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Commits on Apr 11, 2021

Free stats when releasing model type.
alonre24
committed

Commits on Apr 12, 2021

Fix rdb decode v0 to fit the new changes.
alonre24
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