Merge branch 'rlidwka-master'
added fcntl() binding

Currently, it only supports GETFD|SETFD actions with flag FD_CLOEXEC
add fcntl to README.md
Merge pull request #32 from gfxmonk/fcntl

Add `fcntl` bindings for FD_CLOEXEC
bump version
ThrowException -> NanThrowError