Some typos on the overview and routing page

Imported Google Group message. Original thread at: Redirecting to Google Groups Import Date: 2016-01-19 21:23:47 +0000.
Sender:Jack Yeh.
Date:Tuesday, 15 September 2015 16:11:25 UTC+1.

Hi, I found some typos on the overview and routing page.
The changes are highlighted in red, please take a look!


Imported Google Group message.
Sender:Martin Buhr.
Date:Tuesday, 15 September 2015 16:19:04 UTC+1.

Thanks jack - will do :slight_smile: