Version 0.2.15

* Added some solaris constants for dlsym/dlopen
* Add if_nameindex and if_freenameindex
* Add reboot() and constants
* Fix warnings on 1.9.0 and earlier rustc versions.
* Add pthread_condattr_t bindings
* Add setlocale/wsetlocale on Windows
* Add sethostname for FreeBSD
* Add utmp bindings
* Add some passwd related functions
* Add some ptrace option parameters
* Add clock_nanosleep
* Add getgid
* Add memcpy/memmove