Batch send SCP and SPF in two transactions

Remove the scp_from_csv command from spc. Add a scprimebatch command to spc that will allow the CSV to contain both coin and fund outputs. The command will then bundle up and send all coin outputs in one multi-spend transaction and all fund outputs into a second multi-spend transaction. Before sending the two transaction off it will also test to see if both transactions are fundable and will refuse to send either transaction if both transactions will not be able to be sent. Lastly, if only coins or funds (but not both) exist in the CSV then only one multi-spend transaction will be created and sent.

Note: The protocol and wallet code support bundling up and sending both coin and fund outputs in the same transaction but some 3rd party software (and possibly the explorer module code) currently relies on this not happening so using two transactions instead of one allows us to maintain backwards compatability.