Merge pull request #254 in G/fastr from ~ADAM.WELC_ORACLE.COM/fastr:feature/builtins_sprint to master

* commit '477b1fe5':
  Rewritten parameter casts for Encoding and setEncoding builtins.

Merge pull request #251 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:bugfix/findcontextnode to master

* commit 'ad0f375e':
  do not use the FindContextNode class directly

Merge pull request #253 in G/fastr from ~ADAM.WELC_ORACLE.COM/fastr:feature/builtins_sprint to master

* commit '0d32f917':
  Rewritten parameter casts for duplicated and anyDuplicated builtins.
  Simplified parameter cast to use freshly added abstract vector check.
  Added test for abstract vector to cast builder.

* commit 'b3c3333a':
  Fix checkstyle problem
  add raw specialization to match
  simplify handling of compressed connections; fix mode propagation bug with gzfile on non-compressed file
  add setFileTime .Internal

Merge pull request #249 in G/fastr from ~ADAM.WELC_ORACLE.COM/fastr:feature/builtins_sprint to master

* commit '01f95ed4':
  Added fallback to drop builtin.
  Rewritten parameter casts for compilePKGS builtin.
  Rewritten parameter casts for .cache_class builtin.

Merge pull request #252 in G/fastr from ~ZBYNEK.SLAJCHRT_ORACLE.COM/fastr:preserveNonVectorFlag to master

* commit 'b5989e16':
  An overloaded version of the asVector() coercion added allowing specifying the preserveNonVector flag.

An overloaded version of the asVector() coercion added allowing specifying the preserveNonVector flag.

simplify handling of compressed connections; fix mode propagation bug with gzfile on non-compressed file

* commit '911241ac':
  work on Matrix builtin
  simplify some argument cast nodes, remove special RNull / null mapping
  work on dput and deparse
  work on quote, more RLanguage refactoring

* commit '58bb6020':
  Fix NPE from RScriptCommand refactor

Merge pull request #246 in G/fastr from ~ADAM.WELC_ORACLE.COM/fastr:feature/builtins_sprint to master

* commit '088ff23f':
  Removed redundant conditionals plus renamed ambiguously named variable.
  Fixed a problem with invoking context at top level and rewritten parameter casts for browser functions.
  Removed an eclipse warning.

Fixed a problem with invoking context at top level and rewritten parameter casts for browser functions.

* commit '673cbf64':
  update to jvmci 0.19

Merge pull request #244 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:feature/micks_builtins to master

* commit 'cb913b9e':
  cast pipelines: HiddenInternalFunctions
  cast pipelines for some .fastr functions
  cast pipelines for do.call and forceAndCall
  cast pipelines for conditions,connections,file,serialize,sys,etc., functions
  add cast pipelines for readBin/writeBin
  ConnectionFunctions cast pipelines

* commit '4c2280f9':
  work on strtoi