basic function serialization

...e/truffle/r/nodes/wrapper/processor/WrapperProcessor.java

...e.r.nodes/src/com/oracle/truffle/r/nodes/RSyntaxNode.java

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

...s/src/com/oracle/truffle/r/nodes/access/ConstantNode.java

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

...uffle/r/nodes/access/array/PositionsArrayNodeAdapter.java

...le/truffle/r/nodes/access/array/read/AccessArrayNode.java

...truffle/r/nodes/access/array/read/PositionsArrayNode.java

...le/truffle/r/nodes/access/variables/ReadVariableNode.java

...odes/src/com/oracle/truffle/r/nodes/binary/ColonNode.java

...des/src/com/oracle/truffle/r/nodes/control/BreakNode.java

...nodes/src/com/oracle/truffle/r/nodes/control/ForNode.java

....nodes/src/com/oracle/truffle/r/nodes/control/IfNode.java

...odes/src/com/oracle/truffle/r/nodes/control/NextNode.java

.../src/com/oracle/truffle/r/nodes/control/SequenceNode.java

...des/src/com/oracle/truffle/r/nodes/control/WhileNode.java

...rc/com/oracle/truffle/r/nodes/function/ArgumentsNode.java

...com/oracle/truffle/r/nodes/function/FunctionBodyNode.java

...acle/truffle/r/nodes/function/FunctionDefinitionNode.java

...acle/truffle/r/nodes/function/FunctionExpressionNode.java