Update 03_Variables.md

Fixed a typo.
Added missing word
Merge pull request #10 from maximsc/master

Typo in 07_Version_Control/999_Virtual_Hosts.md
Merge pull request #9 from frederickjansen/master

Added missing word
Merge pull request #8 from pkhobare/patch-1

Update 03_Variables.md
Deploy to OpenShift first draft.
Few more images and some other misc. edits.
Tidying up.
More tidying.