Add 'wizard' mode

[C-Otto]

Running get-neighbour-transactions and the other commands repeatedly is quite frustrating.
BitBook should offer an interactive mode that guides the user to completion.

Idea: add wizard command which asks the "right" questions (and changes the prompt/context).

• Ask for owned address if get-neighbour-transactions returns empty list
• Automatically show updated transaction details as soon as new information has been provided
• Pick highest value transaction from get-neighbour-transactions, go into transaction specific mode
• • exit wizard
• • done with transaction, pick new transaction (with highest/second-highest) value
• • pick a different transaction (from get-neighbour-transactions)
• • add description for transaction
• • mark inputs/outputs as owned/foreign
• • add descriptions for inputs/outputs

The transaction specific mode should offer shortcuts that enable the user to provide answers faster than using the commands like mark-address-as-owned and supplying the arguments via tab completion or copy&paste.

• d <description> to add description for transaction
• o all to mark all addresses with unknown ownership as owned
• f all ... as foreign

Alternatively, go through all inputs/outputs and ask specific questions (with sensible defaults). This would be problematic for transactions with many inputs/outputs, though.

[C-Otto]

See https://github.com/C-Otto/BitBook/projects/1