Full node snapshot

[barryz]

Kardia main-net has about 7M blocks. Fresh node sync from scratch and catching up to the latest block will take a long time.
Can your team provide a database snapshot for syncing acceleration?

[trinhdn97]

@barryz We are working on state trie pruning for full node at #253. Hope that there will be a official database snapshot shortly after this feature is done implementing.