install instructions use unprefixed fedora image

Signed-off-by: Lokesh Mandvekar <lsm5@redhat.com>
Update instructions for mtu flag for Docker on GCE
Simplified and streamlined Amazon Quickstart

The amazon quickstart images are EBS backed and include cloudinit. I've personally tested these documentation changes as a new user to Docker.
Tweak formatting for GCE instructions
Missing pipe in line 85
Fixed #3481 - Added Ubuntu Saucy to installation

Docker-DCO-1.0-Signed-off-by: James Turnbull <james@lovedthanlost.net> jamtur01
Only get rootfs when we need to calculate the image size

Docker-DCO-1.0-Signed-off-by: Michael Crosby <crosby.michael@gmail.com> (github: crosbymichael)
Fix Travis handling of a fully-numeric commit hash being YAML-converted to a number instead of a string

Docker-DCO-1.0-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)
Merge pull request #3491 from tianon/travis-numeric-commit

Fix Travis handling of a fully-numeric commit hash being YAML-converted ...
Merge pull request #3487 from crosbymichael/improve-images-speed

Only get rootfs when we need to calculate the image size
Merge pull request #3488 from jamtur01/1310

Fixed #3481 - Added Ubuntu Saucy to installation
Merge pull request #3461 from jbeda/patch-1

Update instructions for mtu flag for Docker on GCE
Merge pull request #3462 from tsaavik/patch-2

Simplified and streamlined Amazon Quickstart
Merge pull request #3483 from lukaspustina/patch-1

Missing redirect in line 85
Merge pull request #3430 from lsm5/fedora-official-image

install instructions use unprefixed fedora image
Move image_export to a job

Docker-DCO-1.0-Signed-off-by: Victor Vieux <victor.vieux@docker.com> @vieux

Docker-DCO-1.0-Signed-off-by: Victor Vieux <victor.vieux@docker.com> (github: vieux)