Fixed problem where CPU bits mismatches OS bits

Now looking at OS in stead of CPU.
Bonus: Skipping CPU is faster. Trying fallback for older OS.
I am on Linux, so I have only tested this using my common sense VM.
(GH-396) Just use intptr size

 Simplify Get-Processor bits to not even make a call to WMI, just look at the
 length of the intptr, which works in older and newer OSes.
Merge branch 'patch-3' into stable

* patch-3:
  (GH-396) Just use intptr size
  Fixed problem where CPU bits mismatches OS bits
(GH-396) add specs for Get-ProcessorBits

This adds a few specs for ensuring get-processorbits is working properly
(GH-396) removed unnecessary code

This removes the $osArch variable as it is no longer needed.
(maint) move the Chocolatey-NuGet specs down with the rest.