Creating new README from scratch in the Markdown with enhanced instructions.
The readme is recreated with instructions that allow most people with basic knowlegde to boot up their development machine.
the code also explains which version of rails to install along with ruby.
Typo in Readme file name
Merge branch 'documentation-to-markdown' of https://github.com/PicoReclame/railsgirls-nl into PicoReclame-documentation-to-markdown
Fix some typos.