Merge pull request #104 from ewasm/lrettig-patch-1

Fix memory line

Merge pull request #101 from ewasm/refill-call-checks

Refill call checks

Merge pull request #82 from ewasm/get-blockhash

fix block hash endianess

Merge pull request #61 from ewasm/refill-getextcodesize

Update getExternalCodeSize, bytecode and bytecode size is different