Upgrade CosmWasm to 0.9 (#245)

* Upgrade chain to v0.9.0-alpha4

* Update expected build_tags

* Update wasmd init contracts

* Update hackatom test contract

* Update CosmWasm message descriptions

* Make some test code more compact

* Pull out InstantiateOptions

* Add admin field to ContractInfo

* Allow instantiating with admin

* Remove some noise

* Add SigningCosmWasmClient.updateAdmin

* Create return type ChangeAdminResult

* Add SigningCosmWasmClient.clearAdmin

* Add SigningCosmWasmClient.migrate

* Move message type testers close to type

* Export MsgUpdateAdmin/isMsgUpdateAdmin

* Fix typo in privillage

* Update some test code

* Test hackatom result data

* Add compatibility table

* Update wasmd to v0.9.0-beta

* Upgrade test contracts

scripts/wasmd/contracts/checksums.sha256

@@ -1,3 +1,3 @@
-41b3bafd7f9a3870bbfb0a0620508df564c52499cdcdc67bf9df72262f3958a6  cw-erc20.wasm
-f4bba4289d150c0348ec42444fa142edd22ce5a024ad3314405c70314f3eb0fc  cw-nameservice.wasm
-0f08a890443dbf644f61a7dc3aa7b2a03e9d142dd1b718aa8b7f8a80b886bff1  staking.wasm
+3e97bf88bd960fee5e5959c77b972eb2927690bc10160792741b174f105ec0c5  cw-erc20.wasm
+851aa8bbc76bc2326a38b99e1432bb06a8ed36442a68e9e676d10ed8beedd1d1  cw-nameservice.wasm
+44397b14c9ec35b3188d16b5ed46de2fb6397d7bf2d1f2755a9970054aa7abb0  staking.wasm