Update "3.0.0" branch from master with changes necessary for 3.0.2, including:

commit 4e9f5e323479cd973d3ff70532a6b909cf01a06c
Author: Phil Labee <plabee@couchbase.com>
Date:   Mon Oct 6 16:46:39 2014 -0700

    CBD-1425:  get dependencies from non-expiring S3 bucket:

        "http://packages.couchbase.com/couchbase-server/deps"

    instead of:

        "http://packages.northscale.com/deps"

commit 3724e70d9bd6b4a28911aca453a0043534c48c36
Author: Chris Hillery <ceej@couchbase.com>
Date:   Mon Sep 29 15:35:44 2014 -0700

    MB-11060: Fixes to dep download mechanism

commit 3c5235cb5216f2b35e93a8700fc9b0584fe723e1
Author: Chris Hillery <ceej@couchbase.com>
Date:   Thu Sep 25 16:36:29 2014 -0700

    Support multi-architecture builds on same machine.

Change-Id: I2bbddf9b367cbd93ed00e1f0aa5103e56bb5bd22
Reviewed-on: http://review.couchbase.org/43769
Reviewed-by: Chris Hillery <ceej@couchbase.com>
Tested-by: Chris Hillery <ceej@couchbase.com>