Navigator pushState at getting started

- Move `tutorial-navigator` to **Getting started** page.
- Add `pushState` and hashed routes for `tutorial-navigator`.
- Remove from sidebar all tutorials included in `tutorial-navigator`.
- Update getting started texts.


![image](https://cloud.githubusercontent.com/assets/367429/3221276/b105dcec-f009-11e3-8250-c9689ff8230d.png)

For this version is just the tech name since is shorter and more user friendly. They don't repeat through app types, and even if they did, I can resolve which type it is from the **apptype** part of the route. I thought it was redundant to say `#!/native-mobile/android-mobile/nodejs-api` and just leave it as `#!/native-mobile/android/nodeapi`