Formatting - installation.md

[sspencerwire]

• To be clear, there is nothing wrong with the way the document was
  formatted to begin with, BUT crowdin was seeing things like italics and
  bold face as <0>item</0> instead of the appropriate tag. This is a
  theory that the itallics (_) which can also be displayed as a single (*)
  and is most commonly done that way throughout the rest of the
  documentation, is being misinterpretted. This is true for the bold
  (double _) as well, which can be (double *) instead.

Author checklist (Completed by original Author)

• Contribution a good fit for the Rocky project? Title and Author MetaTags inserted ?
• Is this a non-English contribution?
• If applicable, steps and instructions have been tested to work on a real system
• Did you perform an initial self-review to fix basic typos and grammatical correctness

Rocky Documentation checklist (Completed by Rocky team)

• 1st Pass (Check that document is good fit for project and author checklist completed)
• 2nd Pass (Technical Review - check for technical correctness)
• 3rd Pass (Basic Editorial Review)
• 4th Pass (Detailed Editorial Review and Peer Review)
• Final pass/approval (Final Review)