fix f# command line tutorial (dotnet#2403)

fix typos and wrong commands (tested with .net core sdk 1.0.4)

Author: enricosada

docs/fsharp/tutorials/getting-started/getting-started-command-line.md

@@ -18,7 +18,7 @@ This article covers how you can get started with using F# on .NET Core. It will
 
 ## Prerequisites
 
-To begin, you must install the [.NET Core SDK 1.0 or later)](https://dot.net/core). There is no need to uninstall a previous version of the .NET Core SDK, as it supports side-by-side installations.
+To begin, you must install the [.NET Core SDK 1.0 or later](https://dot.net/core). There is no need to uninstall a previous version of the .NET Core SDK, as it supports side-by-side installations.
 
 This article assumes that you know how to use a command line and have a preferred text editor. If you don't already use it, [Visual Studio Code](https://code.visualstudio.com) is a great option as a text editor for F#. To get awesome features like IntelliSense, better syntax highlighting, and more, you can download the [Ionide Extension](https://marketplace.visualstudio.com/items?itemName=Ionide.Ionide-fsharp).
 
@@ -44,10 +44,10 @@ Change directories to *FSNetCore* and start adding projects to the solution fold
 Use the `dotnet new` command, create a Class Library project in the **src** folder named Library. 
 
 ```bash
-dotnet new classlib -lang F# -o src/Library 
+dotnet new lib -lang F# -o src/Library 
 ```
 
-The folowing directory structure is produced as a result of the command completing:
+The following directory structure is produced as a result of the command completing:
 
 ```
 └── FSNetCore
@@ -72,7 +72,7 @@ let getJsonNetJson value =
 Add the Newtonsoft.Json NuGet package to the Library project.
 
 ```bash
-dotnet add package Newtonsoft.Json
+dotnet add src/Library/Library.fsproj package Newtonsoft.Json
 ```
 
 Add the `Library` project to the `FSNetCore` solution using the `dotnet sln add` command:
@@ -91,7 +91,7 @@ Use the `dotnet new` command, create a Console app in the **src** folder named A
 dotnet new console -lang F# -o src/App 
 ```
 
-The folowing directory structure is produced as a result of the command completing:
+The following directory structure is produced as a result of the command completing:
 
 ```
 └── FSNetCore
@@ -122,11 +122,12 @@ let main argv =
     0 // return an integer exit code
 ```
 
-Change directories to the *App* console project and add a reference to the `Library` project using `dotnet add reference`.
+Add a reference to the `Library` project using `dotnet add reference`.
 
 ```bash
-dotnet add reference ../Library/Library.fsproj
+dotnet add src/App/App.fsproj reference src/Library/Library.fsproj
 ```
+
 Add the `App` project to the `FSNetCore` solution using the `dotnet sln add` command:
 
 ```bash
@@ -135,9 +136,10 @@ dotnet sln add src/App/App.fsproj
 
 Restore the NuGet dependencies, `dotnet restore` and run `dotnet build` to build the project.
 
-Run the project passing `Hello World` as arguments.
+Change directory to the `src/App` console project and run the project passing `Hello World` as arguments.
 
 ```bash
+cd src/App
 dotnet run Hello World
 ```