implement sink etc., modify code to use stdout/err as appropriate

...fle.r.engine/src/com/oracle/truffle/r/engine/REngine.java

...y/src/com/oracle/truffle/r/library/utils/CountFields.java

...cle/truffle/r/nodes/builtin/base/ConnectionFunctions.java

...com/oracle/truffle/r/nodes/builtin/base/Contributors.java

.../src/com/oracle/truffle/r/nodes/builtin/base/License.java

...m/oracle/truffle/r/nodes/builtin/base/PrintFunctions.java

...tin/src/com/oracle/truffle/r/nodes/builtin/base/Quit.java

...tin/src/com/oracle/truffle/r/nodes/builtin/base/Scan.java

...om/oracle/truffle/r/nodes/builtin/base/SinkFunctions.java

.../com/oracle/truffle/r/runtime/conn/ConnectionSupport.java

...rc/com/oracle/truffle/r/runtime/conn/FileConnections.java

...rc/com/oracle/truffle/r/runtime/conn/GZIPConnections.java

...me/src/com/oracle/truffle/r/runtime/conn/RConnection.java

.../com/oracle/truffle/r/runtime/conn/SocketConnections.java

...src/com/oracle/truffle/r/runtime/conn/StdConnections.java