Icons in PublishPackageView, SampleData and small modifications to PublishPackageViewModel

#### Final result

![iconsforpackagemanagerpublish](https://cloud.githubusercontent.com/assets/916345/4653915/e5fbf14a-54b1-11e4-9e06-a45fc6957a2f.PNG)

#### Reviewers

@Benglin 
@elayabharath on UI