support 32-bit and 64-bit binary. Also preserve cf-twin upgrade for 3.5.x clients
Change: Do not define demidecode variables on rhel4

Ref: https://dev.cfengine.com/issues/6302#note-8

For consistency in reporting (and a small decrease in storage space
required) it is better to not define inventory variables that are
unsupported.
Merge pull request #295 from phnakarin/patch#cf-upgrade_002

support 32-bit and 64-bit cf-upgrade binary. Also preserve cf-twin upgrade for 3.5.x clients
Merge pull request #296 from nickanderson/redmine-6302

Change: Do not define demidecode variables on rhel4
Add inventory attributes 'BIOS vendor' and 'BIOS version' on Windows
remove unused dmi inventory vars
Add inventory 'CPU model' on Windows
Add inventory 'System manufacturer' on Windows
Merge pull request #297 from estenberg/inventory/windows

Inventory/windows