Merge pull request #9 from bbrandt/dev

Add instructions configuring VS2015 to compile sln

Author: nblumhardt

README.md

@@ -124,3 +124,8 @@ See `test/Serilog.Formatting.Compact.Tests/FormattingBenchmarks.cs`.
 |         `CompactJsonFormatter` |  6.0315 µs | 0.0429 µs |   0.53 |
 |        `RenderedJsonFormatter` | 13.7585 µs | 0.1194 µs |   1.22 |
 | `RenderedCompactJsonFormatter` |  7.0680 µs | 0.0605 µs |   0.63 |
+
+### Compiling
+
+Opening serilog-formatting-compact.sln requires VS2015 Update 3 with the .NET Core tooling to be installed.  
+See: https://www.microsoft.com/net/core#windows