0.1.0

First consumable release. Read + write endpoints against velocity-node:

Read:
- GetStatusAsync, GetLatestBlockAsync, GetBlockAsync, ListBlocksAsync
- GetBalanceAsync, GetAccountBalancesAsync
- GetCommitteeAsync, GetNamespaceBridgePolicyAsync
- GetFinalizedBridgeEventsSinceAsync, GetProofAsync

Write:
- MintAsync, TransferAsync, BurnAsync
- RegisterAccountAsync, RegisterNamespaceAsync, DepositFuelAsync

Infrastructure: UnityWebRequest wrapper, typed exception hierarchy,
QueryString helper, ProofResult 200/409/404 typed states.

Deferred to 0.2.0: BridgeOutAsync, SSE streaming, sample scene.