radfish

Otherwise 'tests' package ends up in site-packages/tests, which is no good.

``` bitcoinrpc.cpp: In instantiation of ‘void RPCListen(boost::shared_ptr, boost::asio::ssl::context&, bool) [with Protocol = boost::asio::ip::tcp; SocketAcceptorService = boost::asio::executor]’: bitcoinrpc.cpp:808:54: required from here bitcoinrpc.cpp:680:93: error: ‘class boost::asio::basic_socket_acceptor’ has no member named ‘get_io_service’ AcceptedConnectionImpl*...

setup: remove dep on backport of shutil

1

This backport was needed only for Python 2 (the shutil.which module was backported from Python 3 to 2). In Python 3, the module is imported from the built-in standard library....