Update index.html - Fixed typos and improved text.

Created by: stefanb2

Same as PR #38 by @ageir but applied to the source file instead. I've kept the credits from the original git commit.

@aegir: can you make sure that I didn't miss any of your changes in the manual copy & paste?

@sbabic: do I need to include the rebuild of examples/www/v2 in my pull request?