sys 3.3

• Unix: automatially path.expand() to normalize e.g. homedir
• Unix: skip unicode path test on systems without UTF-8 locale.

sys 3.2

• Windows: only use CREATE_BREAKAWAY_FROM_JOB if the process has the permission to
  do so. This fixes permission errors in certain restricted environments.
• Windows: enable JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE to kill orphaned children
• Windows: enable JOB_OBJECT_LIMIT_SILENT_BREAKAWAY_OK to allow for nested jobs

sys 3.1

• Windows: run programs through utils::shortPathName()
• New function as_text() for parsing raw vectors into text
• Skip a unit test if the 'whoami' program is not available

sys 3.0

• Major cleanup: moved all of the unix specific functions into the unix package
• The 'sys' package now only focuses on executing shell commands
• Removed configure script, no longer needed
• Windows: fix error message when running non-existing command
• Fix support for callback functions as std_out / std_err as documented

sys 1.5

• rlimit values 0 are now ignored and Inf means RLIM_INFINITY
• Windows: fix crash for very long commands