2012.03.15 Version 0.6.13 (stable)

* Windows: Many libuv test fixes (Bert Belder)

* Windows: avoid uv_guess_handle crash in when fd < 0 (Bert Belder)

* Map EBUSY and ENOTEMPTY errors (Bert Belder)

* Windows: include syscall in fs errors (Bert Belder)

* Fix fs.watch ENOSYS on Linux kernel version mismatch (Ben Noordhuis)

* Update npm to 1.1.9
  - upgrade node-gyp to 0.3.5 (Nathan Rajlich)
  - Fix isaacs/npm#2249 Add cache-max and cache-min configs
  - Properly redirect across https/http registry requests
  - log config usage if undefined key in set function (Kris Windham)
  - Add support for os/cpu fields in package.json (Adam Blackburn)
  - Automatically node-gyp packages containing a binding.gyp
  - Fix failures unpacking in UNC shares
  - Never create un-listable directories
  - Handle cases where an optionalDependency fails to build