Add notarization instructions

docs/Notarize Document.md

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+# Notarize a Document
+
+1. The document must be a PDF. If it is not a PDF, convert it to one. Most word processing programs are capable of doing this.
+2. Open IPENtool.
+3. Click **Add PDF**.
+4. Select the PDF to sign and click Open.
+5. You should now be able to view the document.
+6. You have the option to add signatures, notarial stamps, text, blank pages, and/or notarial certificate blocks to the document. You'll need to fill in your notary profile to use some of these tools; if you haven't yet, click **Settings**, fill in the information, press **Save**, and then press **Close**.
+7. Click on the tool you want to use. Some tools have extra steps before they can be applied to the document:
+    * **Sign (Client)**: A signature pad will appear. Have the client sign their name on the pad. The **Erase** button clears the pad, and the **Undo** button erases the last stroke. Press **Apply** when the signature is complete.
+    * **Add Text**: Type a line of text into the box and press **OK**.
+    * **Add Certificate**: The Notarial Certificate Builder popup will open. Fill in the details, and when the preview looks correct, press Apply.
+8. After selecting a tool, you'll see a translucent preview of the tool follow your mouse pointer around. Click to select the page you want to apply the tool to (the selected page will have a green border), and click again to apply the tool at the location shown by the preview.
+9. When the document is filled out, click **Save Signed PDF**. If this is your first time using IPENtool, you'll need to enter a password and generate a signing key. If you've used IPENtool before, enter your password if prompted. After the signing key is created and/or unlocked, you'll be prompted to save the signed file.
+10. After selecting a name and location for the signed file, wait until you see a confirmation message ("File signed and saved"). You may record the SHA256 hash, or part of it, in your journal if you wish.  The hash is a unique code mathematically produced from the signed file; no other file has the same hash. Recording the hash in your journal provides extra proof that you notarized the document.
+11. Send the signed file to the client.