0.2 - Support for Windows and rename Id -> ID

Support for non-Linux platforms was added in this release. When a PCIIDS
db file cannot be found locally, as is the case on Windows, then pcidb
will attempt to fetch the latest pciids file from the Internet and cache
this file in the $USER's homedir. This cached file will then be parsed
for PCI information.

The fields for `pcidb` structs that were called `Id` are now DEPRECATED.
Corresponding fields called `ID` are now included in each struct and
should be used in favor of the `Id` fields. The `Id` fields will be
REMOVED from the `pcidb` structs in the 1.0 release.

Initial release of pcidb library

Contains the Vendor, Product and Class querying and pciids database file
parsing functionality that used to be in the `ghw` library.