Update README to reflect the latest changes

Author: dalexsoto

README.md

@@ -50,9 +50,7 @@ Now you are done and can skip to [Adding additional resources!](https://github.c
 
 #### Step 1 - Get PSPDFKit .aar File
 
-1. Download PSPDFKit from your [customer portal](https://customers.pspdfkit.com) if you haven't done so already, or [request an evaluation version](https://pspdfkit.com/#trynow).
-2. Unzip the file you downloaded above and copy `pspdfkit-x.x.x.aar` to [`PSPDFKit.Android/Jars`](PSPDFKit.Android/Jars) folder.
-3. Run `./build.sh` (on macOS) or `./build.ps1` (on Windows, PowerShell) command from root directory. This will download additional resources needed by the binding. Note that running this will require you to have [Xamarin](https://www.xamarin.com/platform) already installed on your computer.
+Run `./build.sh` (on macOS) or `./build.ps1` (on Windows, PowerShell) command from root directory. This will download all the required resources needed by the binding. Note that running this will require you to have [Xamarin](https://www.xamarin.com/platform) already installed on your computer.
 
 **💡 Note:** Ensure the files are really named `pspdfkit-x.x.x.aar` so there is no hidden `.zip` file ending. OS X likes to add these things and doesn't show them by default. Use the Inspector to be sure.