README.md:  Added instructions for how to get started developing.
The only things that were not obvious to me were that we have to
install node.js and phantomjs.
README.md: added instructions for PostgreSQL.
Simplified the Read class.
Merge branch 'feature/view_topic_list'

Updated README.md to have correct Ruby version.
Added Nokogiri information to README.md.
Merge pull request #3 from DavidEGrayson/feature/view_topic_list

Nicer README.md and simplified code in app/services/repositories/reads/read.rb