Implemented remote address selection dialog

src/main/java/fucoin/Main.java

src/main/java/fucoin/MainRemote.java

src/main/java/fucoin/actions/Action.java

src/main/java/fucoin/actions/join/ActionJoin.java

src/main/java/fucoin/gui/WalletGuiControlImpl.java

src/main/java/fucoin/wallet/WalletImpl.java