Merge pull request #288 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:bugfix/complex_matmult to master

* commit 'de3b2247':
  fix faulty calculations in MatMult (+ takes precedence over <<)

Merge pull request #264 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:feature/update_truffle2 to master

* commit '616ea6e1':
  update Truffle dependency

* commit 'f1d03ed2':
  Adjusting the code to compile with Truffle @ 0.16 as well as the new one which doesn't throw IOException from eval-like methods

Adjusting the code to compile with Truffle @ 0.16 as well as the new one which doesn't throw IOException from eval-like methods

* commit 'b7cbf241':
  add env var to suppress release dist generation
  release dist: fix use of relative path
  add back FASTR dist
  add description attributes to suite distributions
  update ExpectedTestOutput for list.files test with CITATION
  add missing new files
  remove explicit paths for the ASM libraries; add com.oracle.truffle.r.release project; remove FASTR distribution; add FASTR_RELEASE distribution; add custom projects for native/release

* commit 'c6cddfc4':
  Conflict resolution in Arg builtin, a leftover nested class removed from IsUnsorted
  IsUnsorted builtin refactored, isType functions
  Diag builtin refactored
  Ceiling and Floor builtins refactored
  Arg reimplemented using UnaryArithmeticBuiltinNode and Arg tests un-ignored

* commit '1b2e3761':
  A fix-up in AnyNA
  Arg builtin implemented
  More anyNA tests
  Builtin AnyNA uses the recursive argument

* commit '55d17f77':
  Fix fallback handlers were not using generic arguments.

* commit 'a793d8ca':
  pkgtest/graalvm: Rscript is case sensitive

* commit '0b7db58f':
  introduce optimized visibility handling
  move setting and retrieving visibility into special nodes
  remove unnecessary calls to setVisibility
  explicitly configure visibility for fast paths, fast paths subclass RBaseNode instead of RNode
  introduce CallRFunctionNode and CallRFunctionCachedNode and route all calls through them
  cleanup RArguments.create functions and remove RArgumentsNode
  pass along signature in RArgumentsNode

remove explicit paths for the ASM libraries; add com.oracle.truffle.r.release project; remove FASTR distribution; add FASTR_RELEASE distribution; add custom projects for native/release

Merge pull request #280 in G/fastr from ~ZBYNEK.SLAJCHRT_ORACLE.COM/fastr:isFractionalFilter to master

* commit '20e68189':
  the "overloads" warning suppression added
  isFractional filter and doubleToInt mapper added

* commit 'd89dbfb0':
  enable passing tests