Moving node related api queries into NodeApi class.
Renaming CryptiNode class to Node.
Renaming CryptiReport class to Report.
Renaming CryptiAccount class to Account.
Renaming CryptiWithdrawal class to Withdrawal.
Checking sync status of each node.

- Sync status is skipped unless node is loaded.
- Mining info and account balance are skipped unless node is synced.