improved landingpage

To prevent endusers turning their back on vrome due to lack of information: see the 'getting started' section I added in the README.md


# REASON

i was fiddling to get vrome to work. It seemed it worked 'sometimes'. Later i found out it only worked on the tabs which I opened *after* my vrome installation.
I almost walked away from it, so I guess this could happen to other users at well.