Added instructions to run the tests. #190

Job	Run time
Format	8s
Prepare tests	3s
Test (account-id)	22s
Test (balance)	21s
Test (block-number)	22s
Test (block-timestamp)	24s
Test (call-runtime)	22s
Test (caller)	22s
Test (caller-is-origin)	21s
Test (code-hash)	22s
Test (default-accounts)	22s
Test (ecdsa-recover)	22s
Test (gas-left)	20s
Test (hash-bytes)	22s
Test (hash-encoded)	23s
Test (instantiate-contract)	22s
Test (instantiate-contract2)	6s
Test (invoke-contract)	20s
Test (invoke-contract-delegate)	22s
Test (minimum-balance)	22s
Test (own-code-hash)	21s
Test (set-code-hash)	7s
Test (set-contract-storage)	1s
Test (terminate-contract)	1s
Test (transfer)	1s
Test (trasferred-value)	1s
Test (weight-to-fee)	1s
	7m 1s

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