Clarify Amazon EC2 installation type

Make clear this documentation is about installing docker on EC2 with the
help of vagrant, which doesn't make it easy to start multiple instances,
instead of plain vanilla EC2 installation.
Sort APIImages by most recent creation date.

Fixes #985.
Merge branch 'master' into login_signal

* master: (54 commits)
  Return JSONError for HTTPResponse error
  Fix TestEnv
  Revert "Bind daemon to 0.0.0.0 in Vagrant. Fixes #1304"
  Add unit tests for build no cache
  Add no cache for docker build
  Move note about officially supported kernel
  Solved the logo being squished in Safari
  Add hostname to the container environment.
  fix same issue in api.go
  improve tests
  Return registy status code in error
  update http://get.docker.io/latest
  Add check that the request is good
  fix tests about refactor checksums
  add ufw doc
  Fixed a couple of minor syntax errors.
  Updated the description of run -d
  Make sure the index also receives the checksums
  Switch json/payload order
  Remove unused parameter
  ...
Stop making a raw terminal to ask for registry login credentials.

It only disables echo asking for the password and lets the terminal to handle everything else.
It fixes #1392 since blank spaces are not discarded as they did before.
It also cleans the login code a little bit to improve readability.
Exit if there is any error reading from stdin.
typo: s/connexions/connections
Print a new line after getting the password from stdin.
bash commands while in the container aren't in the transcript! Added.
'Base' is depreciated and should no longer be referenced in the docs.

https://groups.google.com/forum/\#!topic/docker-club/pEjqMgcrnqA
Reduce connect and read timeout when pinging the registry (fixes issue #1363)
Always consider localhost as a domain name when parsing the FQN repos name
Merge pull request #1389 from dotcloud/1373-improve_checklocaldns

Consider empty /etc/resolv.conf as local dns + add unit test
add docs
Merge pull request #1182 from dotcloud/change_build_usage

change tag -> repository name (and optionally a tag) in build usage
Merge pull request #1400 from gorsuch/doc-typo

* Documentation: fix a typo in the ubuntu installation guide
fix entrypoint without cmd
added tests for 1405
Minor typos found while reading docs
Merge pull request #1382 from monnand/650-http-utils

650 http utils and user agent field
Merge pull request #1408 from dotcloud/1407-localhost_is_a_domain-fix

Always consider localhost as a domain name when parsing the FQN repos name