Added Outlook Web App

I could not find a 32×32 size version of the icon, unfortunately.

I've tested OWA at http://www.mindshiftonline.com/Exchange-Hosting-Demo/
I tried to detect the version there, but I seem to have forgotten to add `\\;version`. The `?` will make the `*` lazy so `([\\d.]+)` will capture the entire version.