1.5.1
  - CRAN fix: do not use CPP in configure

1.5
  - Fix complication on Solaris
  
1.4
  - eval_fork and some more tools have been moved from 'sys' into
    this package.
    
1.1
  - Added geteuid(), seteuid(), getegid(), setegid()
  - Add rlimit_all() wrapper to show all current limits
  
1.0
  - Initial CRAN release
