Merge pull request #637 in G/fastr from ~ZBYNEK.SLAJCHRT_ORACLE.COM/fastr:nullAndMissingFix to master

* commit 'c1135411':
  Predef.typeName() “slow-path” method added
  Cast pipeline filters provide predefined results for NULL and MISSING arguments

Merge pull request #636 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:feature/complete-s3-dispatch to master

* commit '14540176':
  small cleanup and @CompilationFinal in REnvironment
  Internal and group generic dispatch honors __S3MethodsTable__

Merge pull request #633 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/seq_along_dispatch to master

* commit '54458ffa':
  seq_along dispatches to length for objects with class

Merge pull request #634 in G/fastr from ~ZBYNEK.SLAJCHRT_ORACLE.COM/fastr:extBuiltinsCasts3 to master

* commit 'ab4cc527':
  CP added to Rprof and R_getGeneric. CP fixed in Floor, Ceiling, Trunk and Round.

Merge pull request #625 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:feature/cached_format_cleanup to master

* commit 'f67b43b3':
  fix formatting of @Cached arguments

- Add a test on group by for hbase

Merge pull request #630 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:feature/names_lookup_hashing to master

* commit 'f73e1019':
  use hashing for large name lookups, create Collections class

* commit '56f5b397':
  simplify RAbstractVector (remove setNA) and PositionCheckSubsetNode, incMod with profile

Merge pull request #623 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:feature/callmatcher_fast_path to master

* commit 'f4dc078d':
  support fast paths in CallMatcherNode

* commit '2b762cd5':
  fix cumulative functions and add tests
  unify fmod functions and improve BinaryArithmetic.Mod

Merge pull request #631 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:bugfix/rcallnode_empty to master

* commit 'ce332725':
  transferToInterpreter on REmpty in RCallNode

Merge pull request #626 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:feature/shareobjectnode_opt to master

* commit '476aeb45':
  optimized ShareObjectNode

Merge pull request #622 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:feature/doc_generic_goals to master

* commit '97ba697b':
  add generic goals to README.md

* commit 'ce2df48e':
  seq: add additional fast-path specializations

Merge pull request #628 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/small-fixes to master

* commit '3be15b7e':
  Unify double/int sequences: they can have length==0
  More robust stack trace
  Sprintf: handle '%g' with integer argument
  Simple implementation of recordGraphics internal
  Small fixes in RFFI