Add User Guide Screenshots

[Jad212s]

Screenshots should be inserted in the spaces designated by the placeholders on the following user guides:

• [ ] Provider
• [ ] Recipient
• [ ] Normal User
• [ ] Consumer (Public)

This is related to #3 and #4 .

[darnjo]

Looks like this issue is still open, but we have some additional screenshots to add from the recent updates to the site.

I will update the screenshots on a non-Windows machine so they look nicer.