Merge pull request #590 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/nmath-refactoring-wilcox to master

* commit '49e5ba8c':
  Stats vs nmath structure refactoring + wilcox externals

- code corresponding to 'nmath' in GnuR moved to new package:
com.oracle.truffle.r.runtime.nmath
- it turns that Wilcox uses Choose, which is a builtin node, the original
structure did not allow code reuse in such cases
- implement wilcox externals {d/p/q}wilcox and wilcox_free + improved choose

* commit '09c77535':
  create proper srcref attributes for function literals

Merge pull request #587 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/nbinom-weibull to master

* commit '34564388':
  Stats: port weibull distribution
  Stats: port nbinom distribution

Externals implemented: {p/q/d/r}nbinom, and {p/q/d}nbinom_mu

Merge pull request #586 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/stats-cleanup2 to master

* commit '3ea3145b':
  Stats package cleanup

Merge pull request #585 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/fix-parserprocessor to master

* commit '7bdd1bb0':
  Bit more robust suite path construction in GenerateRParserProcessor

- use RMathError
- fix format String in debugging messages
- move methods from GammaFunctions to RMath
- fix javadoc in QuantileSearch

getCanonicalFile() removes any '..' from the path. Some IDEs (intellij) put
'..' into StandardLocation.SOURCE_OUTPUT. With '..' the getParentFile() does
not work as intended.

* commit '5913bafe':
  Refactor common quantile search code from QPois and QBinom + tests

* commit '31073919':
  Fixes to the native interface.

Merge pull request #579 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/stats-cleanup to master

* commit '483c080f':
  Stats code cleanup

- 'final' where possible
- do not assign to parameters
- removed duplicated code in GammaFunctions (which had a bug in it)
- warnings: do not save more than maxWanings warnings

Merge pull request #578 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/more-stats11 to master

* commit '60656d7f':
  Stats: port hypergeometric distribution
  Stats: port non-central F (nf) distribution
  Implement nbeta distribution functions in stats
  Implement nchisq distribution functions

Merge pull request #577 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/mlerror-refactoring to master

* commit 'e51f4cf9':
  Limit the number of warnings put into environment
  Stats errors/warnings methods actually implemented and moved to RMathError

+ small fix in RErrorHandling: when max number of warnings is reached, do not
report the actual number, but the max (like GnuR does).

Merge pull request #543 in G/fastr from ~MICK.JORDAN_ORACLE.COM/fastr:feature/truffle-rffi to master

* commit 'c9b4f171':
  testrffi: add test for C string null termination
  Initial Truffle RFFI implementation

Merge pull request #575 in G/fastr from ~LUKAS.STADLER_ORACLE.COM/fastr:feature/update_truffle to master

* commit 'e89ba976':
  update Truffle dependency

Merge pull request #574 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/better-stat-tests to master

* commit 'e66b86e4':
  Refactor tests of random distribution functions

Provide parameter values for each distribution separately +
honor semantics of common parameters like probability in [0,1] etc.

Few minor fixes of bugs discovered along the way.

Plus 'pgamma' external implemented.

Merge pull request #559 in G/fastr from ~MILOSLAV.METELKA_ORACLE.COM/fastr:utf8ToInt_builtin to master

* commit '0e33da46':
  Improved casts and removed extra specialization in utf8ToInt() builtin..
  Additional eclipse formatting.
  Implemented utf8ToInt builtin.

* commit '770b252b':
  use Java XZ; implement xzfile, bzfile .Internals