Cleaning up the welcome page, terminology.
Adding files for terms
Clean up image text, minor updates to docs.
Don't remove the container= environment variable, as it is crucial for a lot of tools to detect, whether they're run inside an LXC container or not.
Merge pull request #1107 from eliasp/issue-1020

* Runtime: Don't remove the container= environment variable.
Cleaning up the welcome page, terminology.
Adding files for terms
Clean up image text, minor updates to docs.
Shortened lines to 80 columns
Merge branch 'docs20130627' of github.com:metalivedev/docker into docs20130627

Conflicts:
	docs/sources/concepts/manifesto.rst
Fix broken quickstart link
Cleaning up the welcome page, terminology, and images.
Merge branch 'docs20130627' of github.com:metalivedev/docker into docs20130627

Conflicts:
	docs/sources/concepts/manifesto.rst
	docs/sources/index.rst
Merge pull request #1095 from metalivedev/docs20130627

Docs and images updates