Fixed a couple of single dashes in links document

Docker-DCO-1.1-Signed-off-by: James Turnbull <james@lovedthanlost.net> (github: jamtur01)
Merge pull request #5579 from jamtur01/linkdashs

Fixed a couple of single dashes in links document
Update devenvironment.md

`git clone` should use `https` URL.
Merge pull request #5585 from lukemarsden/patch-1

git clone should use https URL in devenvironment.md
Rearrange the existing info a little, and add example style guide

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)
Merge pull request #5587 from SvenDowideit/docs-examples-style-guide

Rearrange the existing info a little, and add example style guide
Fix docker man page to reference selinux-enable flag

Docker-DCO-1.1-Signed-off-by: Daniel Walsh <dwalsh@redhat.com> (github: rhatdan)
Several reader issues fixed

- Fix boot2docker url
- move HomeBrew instructions to a separate section
- fix docker client 5-liner to work (its still ugly)
- fix and update program output

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)
Merge pull request #5592 from SvenDowideit/docs-simplify-osx-install

Several OSX install reader issues fixed
Merge pull request #5562 from rhatdan/master

Fix docker man page to reference selinux-enable flag