Merge pull request #244 from deb-cfengine/installTed

Added installation docs from Master branch
Update installation.markdown

Made changes due to problems with merging.
Update installation-community.markdown

Changes due to cherry-pick issues.
Update installation-community.markdown

Removed edit mark.
Update installation-enterprise.markdown

Copied/pasted new file here so that master and 3.5 would match. Many updates will be made to this page soon.