Include other trace_ RPCs in parity.js

[gavofyork]

Currently missing:

• trace_call (like eth_call but takes an extra what_trace arg)
• trace_rawTransaction (like eth_sendRawTransaction but takes an extra what_trace arg and doesn't actually send it)
• trace_replayTransaction (takes a transaction hash and what_trace arg)

what_trace is an array that should contain one or more of vmTrace, trace and stateDiff, depending on what kind of trace you want to make.

[jacogr]

Any preferences and/or would sane defaults make sense in this case -

For eth.call (i.e. when blockNumber is not specified, it defaults to latest

call (options, blockNumber = 'latest') ...

For eth.trace (and the others with the whatTrace parameter), is there a sane default -

call (options, blockNumber = 'latest', whatTrace = ['vmTrace']) ...

Or don't try and specify most-used whatTrace defaults for these at all.