Only tag the top-most layer, not all interim layers
Add a proposal step for potential MAINTAINERS.

Fixes #3014
Added note about Ubuntu curl installation
initial stab at writing a use/ambassador-pattern howto (Issue #2485)
sd_notify ready status when accepting API requests
Merge pull request #2917 from codeaholics/2698-only-tag-top-layer

Only tag the top-most layer when pushing to a registry
Merge pull request #3060 from dotcloud/sd_notify

sd_notify ready status when accepting API requests
Merge pull request #3038 from SvenDowideit/2485-ambassador-pattern-doc

initial stab at writing a use/ambassador-pattern howto
Merge pull request #3024 from jamtur01/ubunturepo

Added note about Ubuntu curl installation
Merge pull request #3016 from pnasrat/3014-clarify-maintainer-process

Add a proposal step for potential MAINTAINERS.