Not really quite the case. Maori and the British fought tooth and nail for most of the 19th century. In fact, some British officers wanted nothing more than to completely wipe Maori off the face of the planet, and in some areas pretty much succeeded.
NZ's history as far as the colony is concerned is far from peaceful. Maori didn't stop fighting each other, maybe. But they didn't just ignore the British either. They used the British technology against each other, and also against the British.
The major issue with the Treaty of Waitangi is that the Maori version and the English version are not identical. The translations were pretty rough. So even after it was signed by all the tribal leaders across the country, there are still disputes going on between the Crown and many of the Maori tribes today. The only difference is that the weapon of choice is now money and land. Or the expenditure of former, and prolonged occupation of the latter.
http://www.newzealandwars.co.nz/ is a good place to find out about the wars that raged in the 19th century.
The GV app is still just an app. It doesn't replace any of the Apple apps. They're still there and still fully functional. What it does do is make them redundant.
Instead of giving people your cell number, you give them your Google number. At that point, all your voicemail is kept on the Google service, all your calls are routed through the Google service to whatever phone(s) you choose to have the calls go to. You are no longer tied to Apple's Visual Voicemail (which by most people's accounts hasn't worked properly in quite a while anyway) nor are you limited to AT&T's network anymore. The same applies to SMS and so on as well. Use your Google number instead of your iPhone number and you can get the messages on any/all your phones rather than just your iPhone.
The GV app also allows you to make calls out through Google's network. Your phone dials Google, then dials out from Google to where ever. With the apps on the various platforms, this is essentially transparent. You just use the dialer in the GV app instead of the Apple dialer. It doesn't sync your contacts to the Google servers as such. Like all apps on an iPhone, it has access to your contacts directly, so doesn't need to store them on the server. Not that it matters much given you can use Google Sync to do it, or even us iTunes itself.
Having said all that, the Apple phone apps are still all there and you can use those as well if you want. But if you do, CallerID will show your cell # instead of your Google number. If people call that number, you lose things like voicemail transcription features and so on.
I am basing this on the functionality in the applications on other platforms such as Android and Blackberry. I doubt the app for the iPhone would be any different in functionality, only in appearance.
But no, the app doesn't replace the Apple ones. It merely supersedes them and essentially makes them redundant.
"I've seen it. It's rubbish." -- Marvin the Paranoid Android