First release of the Golang HardWare library (ghw)

Features included in the 0.1 release:

* CPU information via ghw.CPU()
* Memory information via ghw.Memory()
* Block storage information via ghw.Block()
* GPU information via ghw.GPU()
* Network interface controller information via ghw.Network()
* Architecture and topology information via ghw.Topology()
* PCI device and database information via ghw.PCI()