better building docs for reliable

BUILDING.md

@@ -9,9 +9,9 @@ You need Visual Studio to build the source code. If you don't have Visual Studio
 
 Once you have Visual Studio installed, go to the command line under the reliable directory and type:
 
-    premake5 solution
+    premake5 vs2019
 
-This creates reliable.sln and opens it in Visual Studio for you.
+Open the generated reliable.sln file.
 
 Now you can build the library and run individual test programs as you would for any other Visual Studio solution.
 
@@ -34,13 +34,6 @@ Then you can run binaries like this:
     ./bin/soak
     ./bin/fuzz
 
-Alternatively, you can use the following shortcuts to build and run test programs directly:
-
-    premake5 test           // build and run unit tests
-    premake5 stats          // runs connection statistics demo
-    premake5 soak           // run the soak test that exercises all library functionality
-    premake5 fuzz           // run the fuzz test that tests the library is able to correctly handle random data
-
 If you have questions please create an issue at https://github.com/mas-bandwidth/reliable and I'll do my best to help you out.
 
 cheers