Version 0.2.16

* Added binding for `memset`
* Added binding for `utmpx`
* Add some poll constants
* Add some scheduling related functions
* Add `sem_timedwait`
* Add `lutimes`
* Add `getchar`
* Add `putchar`
* Fill out some more `kqueue` definitions
* Add `sync_file_range`
This tag has no release notes.