Merge pull request #490 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/prob-distr2 to master

* commit '0c4b26be':
  implement rcauchy
  implement rbeta
  Interface change in RandGenerationFunctions that should address performance

Merge pull request #488 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:bugfix/missing_override to master

* commit '6d1723c7':
  fix usage of split_j_args
  add missing @Override

Merge pull request #483 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/various-fixes to master

* commit 'fd8a7c91':
  Regenerate tests expected output
  Missing node sets the visibility
  Cat refuses non-zero length lists, expressions and language (like in GnuR)
  Binary comparisons support language objects
  Identical checks the types are the same
  Sprintf: when any arg is NULL return character(0)
  Eval supports numeric envir argument
  det_ge_real NA handling matches GnuR
  sort can handle na.last argument == NA
  Log copies attributes to the result
  Fix string2intNoCheck to allow leading zeros
  Deparse supports KEEPINTEGER

Merge pull request #479 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/prob-distributions1 to master

* commit '00d89d1e':
  Add VectorLengthProfile and a LoopConditionProfile to stat functions
  StatsFunctions: support copying of attributes to the result
  Generate expected output for new tests
  Round: accept int/byte vectors
  RandGenerationFunctions infrastructure allows to validate the parameters
  Handle RRNG state in RandGenerationFunctions infrastructure
  Rnorm converted to the new RandGenerationFunctions system
  New common infrastructure for r{xyz} distribution functions + rbinom converted to it
  qgamma implements Function3_2

This node may not be wrapped by BuiltinCallNode, so it needs to handle that itself

Plus minor thing: RInternalError ctor does not fail when the message contains fmt instructions

+ updated documentation for nodes that handle attributes copying

Note: the callers that set the 'opts' parameter explicitly to 0 were modified
so that deparse behaves compatibly.

Merge pull request #482 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:feature/update_truffle to master

* commit '2ec95e20':
  update Truffle, explicitly use DSLGenerator.DEFAULT in RTypes

* commit '82e8de07':
  implement .fastr.pkgsource

Merge pull request #477 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:feature/specials_tests to master

* commit '0dd47ec8':
  don’t test specials without FastROptions.UseSpecials
  change specials to handle fallbacks in recursive cases via a “special parent” reference, add tests

* commit 'd33e7eb7':
  correct parameters to url builtin (3.3.x)

Merge pull request #474 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:feature/unserialize_from_pairlist to master

* commit '1fd263b6':
  add tests for “unserialize”, enable passing tests
  unserialize from pairlist without generating source code, cleanup RDeparse

Plus runif converted to to RandGenerationFunctions