move the documentation to markdown

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
now, with shiney markdown

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)
Merge pull request #5219 from dotcloud/master-doc-markdown

now, with shiney markdown
Changed heading colors and some alignments (no longer center and justification in left column)

Docker-DCO-1.1-Signed-off-by: Thatcher Peskens <thatcher@docker.com> (github: dhrp)
Merge pull request #5224 from dhrp/tp-titles-colors

Changed heading colors and some alignments (no longer center and justification in left column)
Add missing "ps" requirement to PACKAGERS.md

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)
Merge pull request #5204 from ostezer/new-maintainer

Adding myself to the MAINTAINERS
rst->md conversion fix

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)
Merge pull request #5227 from SvenDowideit/fix-conversion-urls-securityblog

rst->md conversion fix
Amend breadcrumbs to link to the section indexes, i.e., home/section/

Docker-DCO-1.1-Signed-off-by: O.S. Tezer <ostezer@gmail.com> (github: ostezer)
Replacing ASCII art image with real diagram

Docker-DCO-1.1-Signed-off-by: Aaron Huslage <huslage@gmail.com> (github: huslage)
This permission should be interpreted as octal, not decimal

Docker-DCO-1.1-Signed-off-by: Kato Kazuyoshi <kato.kazuyoshi@gmail.com> (github: kzys)
Fix headers staying under the menu when clicked-to-scroll.

Docker-DCO-1.1-Signed-off-by: O.S. Tezer <ostezer@gmail.com> (github: ostezer)
Add integration test for hairpin nat

Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume@charmes.net> (github: creack)
SQLite is also available in FreeBSD

Docker-DCO-1.1-Signed-off-by: Kato Kazuyoshi <kato.kazuyoshi@gmail.com> (github: kzys)
Merge pull request #5231 from ostezer/fix-breadcrumbs

Amend breadcrumbs to link to the section indexes, i.e., home/:section/
Merge pull request #5233 from ostezer/docs-fix-scroll-header-margin

Fix headers staying under the menu when clicked-to-scroll.
this topic nolonger crashes the build

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)
Merge pull request #5245 from SvenDowideit/more-working-with

this topic nolonger crashes the build
Merge pull request #5243 from creack/hairpin_nat_test

Add integration test for hairpin nat