[#1439] Update review description.

Changes description
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I have updated the  review page with information and best practices gathered during last week and things discussed at the team meeting.

* [x] We will need @lgheorghiu to help us with a standard way of describing a test case.


How to try and test the changes
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reviewers @alibotean @lgheorghiu @dumol 

Check that changes make sense and they include all things discussed during last meeting.

I will also plane a voice meeting to discuss the conclusion during last meeting.


Check content in browser
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Go to http://styleguide.chevah.com/review.html and check that formating looks good.