payable `dapple test`

[nmushegian]

Also I tried to override the fallback function to make it payable, and that didn't work

contract FakeJoiner is Tester {
 function join(uint256 channelId, uint256 value) returns (bool) {
   return DataMarket(_t).join.value(value)(channelId);
 }
 
 // didn't work
 function() payable {}

 // works
 function getMoney() payable {}
}

so instead I just made a getMoney function, which works

nikolai 3:43 PM
the fallback in dapple test should be extended to be payable and forward value `function() payable { _target.call.value(msg.value)(msg.data) }