* commit 'e639912f':
  add TruffleBoundary to Download
  RNode: replace ClassCastException with instanceof

* commit '5cf2abaf':
  update jdk reference

Merge pull request #409 in G/fastr from ~MICK.JORDAN_ORACLE.COM/fastr:bugfix/unit-tests-apps to master

* commit '0b763120':
  Add app unit tests back to gate

* commit 'a52f80cc':
  udpate Truffle dependency

Merge pull request #402 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:external_builtin_casts to master

* commit '233e7ad3':
  rewrite "download" and "fft" to use builtin casts

* commit 'a14070db':
  Combine fixes
  a couple of 'combine' tests added
  expected test outputs updated
  Rebased on master

Merge pull request #59 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:feature/tests_recall to master

* commit '90203e3d':
  implement Recall using RCallNode

* commit '782ab429':
  clean up loop nodes (split while and repeat, remove unnecessary functions)

Merge pull request #405 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:node_based_write_profile to master

* commit '42ff6e50':
  use node-based profile in CachedReplaceVectorNode

Merge pull request #404 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:remove_builtin_arguments to master

* commit '248cfa21':
  remove unnecessary "RNode[] arguments" from RBuiltinNode
  rename function in OperationFactory

* commit '66dd1d68':
  do not re-wrap frames
  small cleanup in ReadVariableNode
  cheaper checks in several places
  do not use auto-generated expectDouble, etc. functions
  move value profile in ReadVariableNode to an earlier position
  use boolean frame slot for visibility
  ensure that Operations do not throw arbitrary exceptions

Merge pull request #399 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:print_with_s4_show to master

* commit '35ddf1f6':
  use "show" instead of "print" to display S4 objects

Merge pull request #401 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:null_on_unknown_message to master

* commit 'dd4fdf1f':
  return null instead of throwing RInternalErrors on unknown interop messages

* commit 'a7dcbfe4':
  call_rffi: remove debugging code

Merge pull request #392 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/rec-specials to master

* commit 'b410472f':
  Fix BinaryArithmeticSpecial for NaN vs NA values
  Arguments of specials can be other specials