WIP: import state from snapshot
add --snapshotURL and --vochainForceResync flags and the underlying functionality
The former is used for passing an URL from which to download a state snapshot compressed file. If forceResync is set to true all existing vochain data will be wiped and replaced by the decompressed one extracted from the downloaded snapshot, otherwise the downloaded state snapshot compressed file will just be saved.
I'll review again once the tests are green :)
Can you rebase with master and see if the tests pass?
this looks abandoned (or maybe merged but not marked as such?), in any case could we close this?