Cherry-pick 5985386
Add note about quickinstall script internet access requirement.
The quickinstall script downloads packages from the internet, so it
needs internet access to properly function. Also cleaned up trailing
whitespace.
(cherry picked from commit 598538690cede66bc5a75f995ba339d114cf84c4)

Conflicts:
	getting-started/installation/installation-community.markdown
	getting-started/installation/installation-enterprise-free.markdown
Merge branch '3.5' of https://github.com/cfengine/documentation into 3.5
Updating my branch

Merge branch '3.5' of https://github.com/cfengine/documentation into 3.5
Working to git branch in sync
Merge remote-tracking branch 'origin/3.5' into 3.5
Minor clean up of language; remove "Please" in Note.
Merge pull request #302 from deb-cfengine/two_installs

Minor cleanup of text on enterprise/community installation pages