Fix install/unpack for slow network/computers.

The timeout option of 'archive' can lead to partial downloads and,
worse (because it goes undetected) partial unpacks. Disable it.
Merge pull request #1 from mheistermann/fix-timeouts

Fix install/unpack for slow network/computers.
Use architecture suffix for download url
Use metadata.json for module info
Merge remote-tracking branch 'upstream/master'

Conflicts:
	manifests/install/download.pp