Add multiple Cordova related things

* Started package for [Ionic Framework's](http://ionicframework.com) Cordova Plugins
* Added definitions for [cordovarduino](https://github.com/stereolux/cordovarduino) project
I am not sure really. The implementation of cordova plugins isn't streamlined at all. Some put their plugins on the `window` object, others on the `cordova` object and yet others on `cordova.plugins`. That's why I put it here.