fixes #1060, fixes #992, fixes #933

fixes #766, fixes #842
* chore(package): update typescript to version 2.0.3

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* Add customClass property to the Tab directive to make it easy to add class names to the outputted nav-items

* tslint fix

* Clicking on some tabs would sometime result in reloading the application (tested in Chrome). This will probably fix issue #842 which sounds exactly like the scenario this fixes for me.

update rxjs (5.0.0-beta.6 -> 5.0.0-beta.11) and zone.js (0.6.12 -> 0.6.17) dependencies and make updated zone.js work (see https://github.com/angular/zone.js/issues/404)

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