Update README.md
Update README.md
Adds jens post for tuesday and changes h2 css

	new file:   content/pages/wk05-day16-tues-jendiamond-standardlibrarians.mdown
	modified:   content/pages/wk04-day11-mon-stephaniebetancourt-rgsoc-standardlibrarians.mdown
	modified:   public/css/master.css
Merge pull request #16 from TheStandardLibrarians/waleblog

Adds Wale's blog for week 5 day 18.
adds Wale's blog for July 10th. Changes Wale's Gemfile.