Some Scilla tests don't work

[vkomenda]

The method to test Scilla contracts recommended in README.md fails for me with the error message:

$ node testblockchain.js
Blockchain Error
TypeError: Cannot read property 'nonce' of undefined
    at Wallet.<anonymous> (/home/vk/src/zilliqa/kaya/node_modules/@zilliqa-js/account/dist/wallet.js:207:53)
    at step (/home/vk/src/zilliqa/kaya/node_modules/tslib/tslib.js:133:27)
    at Object.next (/home/vk/src/zilliqa/kaya/node_modules/tslib/tslib.js:114:57)
    at fulfilled (/home/vk/src/zilliqa/kaya/node_modules/tslib/tslib.js:104:62)
    at <anonymous>
    at process._tickCallback (internal/process/next_tick.js:189:7)

It's difficult to tell which tests fail and which pass but there are some transactions reported by the server:

[App.js]	 : Method specified GetBalance
[App.js]	 : Getting balance for 7bb3b0e8a59f3f61d9bff038f4aeb42cae2ecce8
[Wallet]	 : Getting balance for 7bb3b0e8a59f3f61d9bff038f4aeb42cae2ecce8
[App.js]	 : Sending response back to client
[App.js]	 : Method specified GetBalance
[App.js]	 : Getting balance for 7bb3b0e8a59f3f61d9bff038f4aeb42cae2ecce8
[Wallet]	 : Getting balance for 7bb3b0e8a59f3f61d9bff038f4aeb42cae2ecce8
[App.js]	 : Sending response back to client

So, perhaps something does work.

Another point is that capitalisation of testblockchain.js is incorrect in README.md. It probably passes on Windows but on a case-sensitive Linux filesystem that won't work.