* setup FEVM during genesis: create ETH0 actor
* make gen
* doExec expects to,from not from, to
* give EAM a predictable address
* update go-state-types
* proper constructor params
* workaround the situation with empty contracts
* put fevm construction after miner construction
* lint
* fix TestAPI itest
off by 1, the new miner is not 1001 anymore; that's ETH0.
* add itest for ETH0 setup
* improve test: check eth0 address
* unknown return types should not be treated as errors from WaitForMessage
* simplecoin FEVM smoke test
* add itest-fevm to circle matrix
* use a named error for metadata lookup failures
* hand-write the fevm basic test
* make gen
* address nits
