Commented out mapping stuff

I've only commented that out because mapping might come back in the future. I haven't even removed all the relevant fragments/activities yet, I'll wait for Al's feedback.
Added Toast for WiFi configuration confirmation

Closes #12, will still need to set the actual network details when they become available. Also, there still is some cleanup to do, and Droidcon fellas should confirm a couple of things (eg. is it a 2.4 GHz or a 5 GHz network?)
A few more strings changes
Workaround for Android Studio UI Preview bug

See https://code.google.com/p/android/issues/detail?id=60167
Merge pull request #21 from rock3r/DroidconUK2013

Continuing work (mostly on the UI)