Merge

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

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

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

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

...s/src/com/oracle/truffle/r/nodes/builtin/base/Paste0.java

...odes/src/com/oracle/truffle/r/nodes/builtin/base/R/eval.R

...des/src/com/oracle/truffle/r/nodes/builtin/base/R/paste.R

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

...le/r/nodes/builtin/base/UseMethod_ClassHierarchyNode.java

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

...est/src/com/oracle/truffle/r/test/ExpectedTestOutput.test

...le.r.test/src/com/oracle/truffle/r/test/all/AllTests.java

.../com/oracle/truffle/r/test/simple/TestSimpleBuiltins.java

mx.fastr/imports