This is to facillitate ease of implementing #1406. (Tags for messages
could then be added dynamically)
Ultimately once we make the router support hiearchical routing, (#770)
we can then remove the name field and just the parse info for tags from that.
Until then, we can parse the tag name as
`fmt.Sprintf("%s %s", msg.Type(), msg.Name())`
The new CLI flag builds an unsigned transaction and writes it to STDOUT.
Likewise, REST clients can now append generate_only=true to a request's
query arguments list and expect a JSON response carrying the unsigned
transaction.
Closes: #966
- call MustSortJSON before return JSON bytes to guarantee alphabetic
ordering
- moved SortJSON and MustSortJSON to types package to avoid cyclic
package dep
Dev Ojha
Alessio Treglia
Sunny Aggarwal
sunnya97
Liamsi