Merge pull request #11 from mkristian/master

please see http://jira.codehaus.org/browse/JRUBY-5848 for details
Updated to stable jnr-ffi and jnr-constants
Bump version to 2.3.0-SNAPSHOT
[maven-release-plugin] prepare release 2.3.0
[maven-release-plugin] prepare for next development iteration
.bat detection properly working uncovered several other logic errors in windows exec code
[maven-release-plugin] prepare release 2.3.1
[maven-release-plugin] prepare for next development iteration
Ensure fstat(int fd) uses __fxstat64() on linux.  Fixes jruby/jruby#390
[maven-release-plugin] prepare release 2.3.2
[maven-release-plugin] prepare for next development iteration
Add travis-ci config
Use real errno value if stat or lstat fails
Cleanups, and use posix.stat() instead of libc().stat() (which can fail under linux)
Add rmdir
Gah delete not rmdir
Add windows impl for this method
Whoops. need to use wide version of wrmdir...especially if I am passing in wchars :)
Add to <developers>
Correct _wrmkdir() to _wrmdir(), and correct _open_osfhandle() signature