Merge branch 'master' into dotnet-coreに移行

# Conflicts:
#	TryCSharp.Common/TryCSharp.Common.csproj
#	TryCSharp.DotNetCore2.Tutorial/TryCSharp.DotNetCore2.Tutorial.csproj
#	TryCSharp.Samples/TryCSharp.Samples.csproj
#	TryCSharp.Tools.Cui/TryCSharp.Tools.Cui.csproj

Author: devlights

README.md

@@ -1,5 +1,5 @@
 # try-csharp
-This is my TUTORIAL project for csharp. (.NET Framework and Mono)
+This is my TUTORIAL project for csharp. (.NET Framework and Mono and dotnet core)
 
 # IDE
 - JetBrains Rider