update README.md
added layout to README
package.json bug fixed
open in default browser
Merge branch 'develop' of https://github.com/JensNevens/PEN

Conflicts:
	Gruntfile.js
	README.md
	package.json
database tests

Handmatig sommige data invullen zodat het zou werken..
ik ga da nog proberen fiksen
Merge branch 'develop' of https://github.com/JensNevens/PEN

Conflicts:
	README.md