Merge

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

...truffle.r.nodes/src/com/oracle/truffle/r/nodes/RNode.java

...fle.r.nodes/src/com/oracle/truffle/r/nodes/RRootNode.java

...nodes/src/com/oracle/truffle/r/nodes/RTruffleVisitor.java

...com/oracle/truffle/r/nodes/access/AccessArgumentNode.java

...rc/com/oracle/truffle/r/nodes/access/AccessArrayNode.java

...rc/com/oracle/truffle/r/nodes/access/AccessFieldNode.java

...oracle/truffle/r/nodes/access/AccessVarArgumentsNode.java

.../com/oracle/truffle/r/nodes/access/ArrayPositionCast.java

...c/com/oracle/truffle/r/nodes/access/ReadVariableNode.java

...r.nodes/src/com/oracle/truffle/r/nodes/access/Symbol.java

.../oracle/truffle/r/nodes/access/UpdateArrayHelperNode.java

...rc/com/oracle/truffle/r/nodes/access/UpdateFieldNode.java

...m/oracle/truffle/r/nodes/binary/BinaryArithmeticNode.java

.../com/oracle/truffle/r/nodes/binary/BinaryBooleanNode.java

...ruffle/r/nodes/binary/BinaryBooleanNonVectorizedNode.java

...s/src/com/oracle/truffle/r/nodes/binary/CastTypeNode.java

...oracle/truffle/r/nodes/binary/CbindFoldOperationNode.java

...acle/truffle/r/nodes/binary/CombineFoldOperationNode.java

...oracle/truffle/r/nodes/binary/RbindFoldOperationNode.java