Merge branch 'master' into feature/internal-pkgtest

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

...rc/com/oracle/truffle/r/engine/RRuntimeASTAccessImpl.java

...ine/src/com/oracle/truffle/r/engine/TruffleRLanguage.java

...rc/com/oracle/truffle/r/library/stats/GammaFunctions.java

...acle/truffle/r/library/stats/RandGenerationFunctions.java

...ibrary/src/com/oracle/truffle/r/library/stats/Rbinom.java

...library/src/com/oracle/truffle/r/library/stats/Rnorm.java

...library/src/com/oracle/truffle/r/library/stats/Runif.java

...rc/com/oracle/truffle/r/library/stats/StatsFunctions.java

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

.../com/oracle/truffle/r/nodes/builtin/RBuiltinPackages.java

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

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

...c/com/oracle/truffle/r/nodes/builtin/base/AsFunction.java

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

...cle/truffle/r/nodes/builtin/base/ConnectionFunctions.java

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

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

...in/src/com/oracle/truffle/r/nodes/builtin/base/Round.java

...ruffle/r/nodes/builtin/base/foreign/ForeignFunctions.java