Further enhancements to factor and data frame support.

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

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

...rc/com/oracle/truffle/r/nodes/builtin/base/AsInteger.java

...rc/com/oracle/truffle/r/nodes/builtin/base/AsLogical.java

...n/src/com/oracle/truffle/r/nodes/builtin/base/Format.java

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

.../oracle/truffle/r/nodes/builtin/base/IsTypeFunctions.java

...racle/truffle/r/nodes/builtin/base/PrettyPrinterNode.java

...rc/com/oracle/truffle/r/nodes/builtin/base/Structure.java

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

...oracle/truffle/r/nodes/builtin/base/UpdateAttributes.java

...racle/truffle/r/nodes/builtin/base/UpdateStorageMode.java

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

...fle/r/nodes/access/array/write/UpdateArrayHelperNode.java

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

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

...src/com/oracle/truffle/r/nodes/unary/CastLogicalNode.java

....r.runtime/src/com/oracle/truffle/r/runtime/RRuntime.java

....runtime/src/com/oracle/truffle/r/runtime/RSerialize.java

.../src/com/oracle/truffle/r/runtime/data/RAttributable.java