[blog] Fix links and bad formatting in the code review blog post

https://gethue.com/rbtools-example-how-do-easily-do-code-reviews-with-review-board/

#1 Fix links and bad formatting in the code review blog post

• add link 'tools/script/hue-review' to the https://github.com/cloudera/hue/blob/master/tools/scripts/hue-review
• https://review.cloudera.org/account/preferences/</a>!
• Remove '<pre><code class="bash">' and use 2 spaces indentation instead

#2

Then we should add the content into a section in https://docs.gethue.com/developer/development/

e.g. of example of format https://raw.githubusercontent.com/cloudera/hue/master/README.md

How to generate the blog or gethue websites https://docs.gethue.com/developer/development/#blog--website