add start script and state sync script

[faddat]

This adds a script that makes working with babylon more ergonomic by
making node setups easier

[SebastianElvis]

Thanks for the contribution Jacob! I believe this script will be helpful for starting a node. Could you move this script to somewhere like scripts/statesync.sh (so that it does not mess with the root directory) and add a Makefile entry for this?

[vitsalis]

That's very useful! I suggest making the RPC endpoint a parameter so we can enable syncing with both a testnet and a mainnet (but it can default to a particular value to enable easy functionality)

[faddat]

I think that we should wait for Makefile integration, till we have a steady network going that can reliably be synced.

[vitsalis]

Looks good! Only thing that we can improve upon is the hardcoded URL for the mainnet, but since this will be a hardcoded one eitherway when we release a stable version, I expect this won't be an issue (when we merge this, I agree that we should wait).

Btw, this PR seems to have some extra commits (about releases). Don't seem to affect anything, just fyi.