Implemented join of remote node into network

src/main/java/fucoin/AbstractNode.java

src/main/java/fucoin/Main.java

src/main/java/fucoin/MainRemote.java

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

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

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

...ava/fucoin/actions/transaction/ActionGetAmountAnswer.java

...ransaction/ActionPrepareDistributedCommittedTransfer.java

src/main/java/fucoin/wallet/AbstractWallet.java

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