rename and break-up some of the facts for better compatibility with existing puppet facts

[liamjbennett]

The defaults system facts included by puppet when running on macosx look something like this:

macosx_buildversion => 12F45
macosx_productname => Mac OS X
macosx_productversion => 10.8.5
macosx_productversion_major => 10.8
macosx_productversion_minor => 5

It would be good to refactor win_facts in the next major version to support a similar naming style:

windows_buildversion => [ 9431 ]
windows_productname => [ Windows | Windows Server ]
windows_productversion_name => [ 7 | 8 | 2003 | 2003 R2 | 2008 | 2008 R2 | 2012 ]
windows_productversion_number => [6.1 | 6.2 | 6.3 ]
windows_productversion_sp => [1-3]

in addition to the existing facts:

windows_productkey
windows_sid
windows_systemtype