Added pinch/zoom feature
Added pinch/zoom feature

KingsDevelopment/angular2-img-cropper,rayzru/angular2-img-cropper,rayzru/angular2-img-cropper,rayzru/angular2-img-cropper,KingsDevelopment/angular2-img-cropper,cstefanache/angular2-img-cropper,KingsDevelopment/angular2-img-cropper,cstefanache/angular2-img-cropper,cstefanache/angular2-img-cropper