Runs paket before dotnet restore

helps speed up the build by running paket directly before dotnet restore.  dotnet restore doesn't have the concept of running a single instance of paket and will run one per project, which has to use a process lock file.  running before dotnet restore makes it so we have less overhead

Author: TheAngryByrd

build.fsx

@@ -54,6 +54,7 @@ Target.create "Build" (fun _ ->
 )
 
 Target.create "Restore" (fun _ ->
+  Fake.DotNet.Paket.restore (fun p -> {p with ToolType = ToolType.CreateLocalTool()} )
   DotNet.restore id solutionFile
 )