Implements createrawtransaction RPC method #2104

Job	Run time
Generate crates matrix	12s
Check crates matrix	4s
Build zebrad crate	37m 19s
Build zebra-utils crate	16m 30s
Build zebra-test crate	1m 35s
Build zebra-state crate	21m 52s
Build zebra-script crate	3m 7s
Build zebra-scan crate	26m 39s
Build zebra-rpc crate	34m 34s
Build zebra-node-services crate	3m 12s
Build zebra-network crate	7m 38s
Build zebra-grpc crate	14m 40s
Build zebra-consensus crate	17m 45s
Build zebra-chain crate	4m 47s
Build tower-fallback crate	1m 0s
Build tower-batch-control crate	1m 18s
Open or update issues for building crates individually failures	0s
	3h 12m 12s

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