* Add netstandard 2.0 target and netcoreapp2.0 tests
* Update xunit
* set tests explicitly to netcore2
* update travis
* Don't say build as netcoreapp1.0
* try adding dotnet 1 too
* Remove .NET Core 1 support
* switch to circle
* update cake
* fix circle build
* try fix file ending test again
* Fix casing on files
* Another casing fix
* Add back netstandard1.0
* Finish adding netstandard 1.0 back
* Add netstandard1.3 back