Add support for Require and ScriptPacks

FSharpScriptEngine.fs

@@ -29,6 +29,13 @@ type FSharpEngine(host: IScriptHost) =
     let commonOptions = [| "c:\\fsi.exe"; "--nologo"; "--readline-"; "--noninteractive"|]
     let session = FsiEvaluationSession.Create(fsiConfig, commonOptions, stdin, stdout, stderr)
 
+    do
+        session.EvalInteraction("let env = new System.Collections.Generic.Dictionary<string, obj>()")
+        let result = session.EvalExpression("System.Action<string, obj>(fun k v -> env.Add(k, v))")
+        match result with
+        | Some value -> let func : Action<string, obj> = unbox value.ReflectionValue in func.Invoke("Host", box host)
+        | None -> failwith "The system is down"
+
     let (>>=) (d1:#IDisposable) (d2:#IDisposable) =
         { new IDisposable with
             member x.Dispose() =

scripts/test.fsx

@@ -0,0 +1,25 @@
+(*
+let x = 1
+let y = 2
+x + y
+|> printfn "%i"
+
+let fizzbuzz n =
+    let rec loop acc n =
+        if n <= 0 then acc else
+        let result =
+            match n % 3, n % 5 with
+            | 0, 0 -> "FizzBuzz"
+            | 0, _ -> "Fizz"
+            | _, 0 -> "Buzz"
+            | _, _ -> string n
+        loop (result::acc) (n - 1)
+    loop [] n
+
+fizzbuzz 10
+|> List.iter (printfn "%s")
+*)
+
+let host : ScriptCs.Contracts.IScriptHost = unbox env.["Host"]
+let adder = host.Require<Adder>()
+adder.Add(3, 4) |> printfn "%i"