VerifyPackage page with more information

As reported in this issue https://github.com/NuGet/NuGetGallery/issues/1570 I added a few more package details on the verify package page:

- MinClientVersion
- Language
- DeveloperDependency
- FrameworkAssemblies
- Dependencies

(ignore the glimpse bar - I choose a poor screen capture plugin ;))

Example with this package https://www.nuget.org/packages/Microsoft.Net.Http/2.2.27-beta results in:
![image](https://cloud.githubusercontent.com/assets/756703/3487442/1b98431e-047e-11e4-9c7e-65f6e228daef.png)

https://www.nuget.org/packages/MvvmLight/
![image](https://cloud.githubusercontent.com/assets/756703/3487450/515f447a-047e-11e4-8cd4-2390d7c38258.png)

And one "devdependency" package https://www.nuget.org/packages/StyleCop.MSBuild/:
![image](https://cloud.githubusercontent.com/assets/756703/3487455/927c2a04-047e-11e4-8252-3925c8ff8afb.png)
What will show if Language is null in the package?  Could we make it "Not Specified" if there's no default of en-US applied?  I don't remember if we apply the default of not.