chore(typings): making typings.json config compatible with Typings v1.x.x
chore(typings): making typings.json config compatible with Typings v1.x.x

Solves #71 (see https://github.com/angular/angular2-seed/issues/71#issuecomment-219818894).

npm _typings_ went up a major release and made [some breaking changes](https://github.com/typings/typings/releases/tag/v1.0.0). One of which is that they renamed _ambient_ to _global_, as in "**ambient**Dependencies" to "**global**Dependencies".

> * Many breaking changes (see https://github.com/typings/core/releases/tag/v1.0.0)
>    * **Renamed ambient to global**
>    * ...
shumik-vladyslav/snow,ziemowitprzebitkowski/tydzien-wykletych,Manankishor/ComcastTechnicalScreening,abhivibhuti/SPCTool,Nabysayna/angular2-seed,megalucio/my-angular2-ecommerce-shop,AmyAmyZhu/ClownFish,budajeff/bingo,sternof/seker,kfir124/angular2-seed,willyelm/angular2-seed,Soolan/the-sherlock-project,shumik-vladyslav/home-map,abhivibhuti/SPCTool,ogix/angular2-seed,sternof/seker,Soolan/the-sherlock-project,WoBinI/WoBinIGame,ogix/angular2-seed,Arahir/hybrid-app,jangroeneveld/portfolio,kfir124/angular2-seed,Nabysayna/angular2-seed,shruti-rao/Angular2Forms,dixso/angular2-seed,budajeff/bingo,angular/angular2-seed,ziemowitprzebitkowski/tydzien-wykletych,nadeeth/angular2-seed,kfir124/angular2-seed,jangroeneveld/portfolio,Soolan/the-sherlock-project,megalucio/my-angular2-ecommerce-shop,shumik-vladyslav/snow,abhivibhuti/SPCTool,shumik-vladyslav/snow,megalucio/my-angular2-ecommerce-shop,budajeff/bingo,flai78/ng2FormTest,icthis3t7/angular2-seed,WoBinI/WoBinIGame,icthis3t7/angular2-seed,Nabysayna/angular2-seed,dixso/angular2-seed,ziemowitprzebitkowski/tydzien-wykletych,flai78/ng2FormTest,jangroeneveld/portfolio,sternof/seker,AmyAmyZhu/ClownFish,shumik-vladyslav/home-map,AmyAmyZhu/ClownFish,willyelm/angular2-seed,cpollard0/haloCoach,ogix/angular2-seed,WoBinI/WoBinIGame,flai78/ng2FormTest,WoBinI/WoBinIGame,cpollard0/haloCoach,cpollard0/haloCoach,dixso/angular2-seed,Arahir/hybrid-app,shruti-rao/Angular2Forms,icthis3t7/angular2-seed,nadeeth/angular2-seed,angular/angular2-seed,shumik-vladyslav/home-map,nadeeth/angular2-seed,willyelm/angular2-seed,Manankishor/ComcastTechnicalScreening,angular/angular2-seed,Soolan/the-sherlock-project,Arahir/hybrid-app,shruti-rao/Angular2Forms,Manankishor/ComcastTechnicalScreening