Removes getters in favor of public member variables.

[MicahZoltu]

Also makes requestReturn external (it is good to be explicit about these things).

Since this contract was put together in a hurry, it is best to keep it as simple as possible, with no extra features beyond what is necessary to do its job. In this case, the getters were unnecessary complications that could be achieve (mostly) through a language feature. This won't do the defaulting for you, but the defaulting is just as easy to do in the calling contract/script as it is here.

[MicahZoltu]

I also added a return value to requestReturn:

Having a return statement allows the caller to assert that the call was made and was successful. Without a return statement, the caller can't tell the difference between the call running out of gas, the input address being wrong, the function signature being wrong (older versions of Solidity) and a successful call. With a return statement the caller can do require(chooseWhgReturnAddress.requestReturn(msg.sender)); to ensure safety.