Add arch/os info to user agent (Registry)
Add dynamic os/arch detection to Images
Added a note about a networking work around.

An additional flag to limit the networking MTU is required in three Compute Engine zones for reliable networking from inside the docker container. Added a warning to that effect to the QuickStart guide.
Update MTU work-around to use the new -mtu flag
use the Makefile - it makes life so much simpler
API documentation update for Privileged

The 1.7 API docs show the ability to pass Privileged
when creating a container. This is not supported as.
Privileged is now part of hostConfig and can only be
passed when starting a container.

This fixes the documentation issue.
Merge pull request #2986 from SvenDowideit/still-need-privileged

still need  -privileged to run a build / test
Minor style cleanups to the API spec docs
Merge pull request #3321 from jamtur01/apiclean

Minor style cleanups to the API spec docs
Merge pull request #3320 from jamtur01/privapi

API documentation update for Privileged
Merge pull request #3302 from briandorsey/master

Added a note about a networking work-around.
Merge pull request #3298 from creack/add_arch_user_agent

Add arch/os info to user agent (Registry)