- aspnet/Universe#349
- minimize `dotnet` setup time; no need for caching
- `KOREBUILD_TEST_DNXCORE` env variable isn't used anymore
- no need for icu4c w/ current `dotnet` builds
The additional `app.HelpOption` here prevents the application from displaying help when that option is passed due to the `CommandLineUtils` choking on the duplicated template; also, `PrecompilationApplication` already defines its own `HelpOption` and `Description`.
* Remove duplicated feeds from testapps/NuGet.config
* Don't specify feeds as part of restore. Let testapps/NuGet.config dictate this.
* Switch to dotnet.myget.org