refactoring to clean up project cycles

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

...c/com/oracle/truffle/r/nodes/builtin/RBuiltinPackage.java

...s/src/com/oracle/truffle/r/nodes/builtin/base/DoCall.java

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

...s/src/com/oracle/truffle/r/nodes/builtin/base/Exists.java

...es/src/com/oracle/truffle/r/nodes/builtin/base/Parse.java

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

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

...racle/truffle/r/nodes/builtin/debug/DebugInfoBuiltin.java

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

...uffle.r.runtime/src/com/oracle/truffle/r/runtime/DCF.java

.../com/oracle/truffle/r/runtime/RBuiltinLookupProvider.java

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

...untime/src/com/oracle/truffle/r/runtime/REnvironment.java

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

...ffle.r.shell/src/com/oracle/truffle/r/engine/REngine.java

...ffle.r.shell/src/com/oracle/truffle/r/shell/RCommand.java

.../src/com/oracle/truffle/r/test/generate/FastRSession.java

mx.fastr/projects