dot net core build instructions update

Author: kjnilsson

BUILD_DOTNET_CORE.md

@@ -1,11 +1,8 @@
 To build the dotnet core components you need the `dotnet` command line utility installed.
 It can be obtained for your chosen platform [here](https://www.microsoft.com/net/core#macosx).
 
- * Run `./fake.sh GenerateApi` (linux/osx) or `fake.bat GenerateApi` (windows) to trigger code generation and complete a standard mono/.NET build.
- * cd into the `projects/client/RabbitMQ.Client` directory
- * Run `dotnet restore`
- * Run `dotnet build`
- * To run the tests cd into `projects/client/Unit.Runner`
- * Run `dotnet restore`
- * Run `dotnet run`. This will run the entire test suite. There is currently no way to only run a subset of tests. 
+ Run `./build.sh` (linux/osx) or `build.bat` (windows) to trigger code generation and complete a dotnet core build. 
+
+ To run the tests simply run `run-tests.sh` (linux/osx) or `run-tests.bat` (windows). This will run the entire test suite. There is currently no way to only run a subset of tests. 
+
  If you get a warning saying `rabbitmqctl` cannot be found please set the `RABBITMQ_RABBITMQCLT_PATH` environment variable to point to where `rabbitmqctl` can be located.