Minor edits and functionality to webapp

I would like some minor edits to be done to an existing web app. The website is called [login to view URL] Please view this video screencast which explains all the edits: [login to view URL] Edits needed - Basic registration and login system. You can use any opensource system you'd like for the registration system, or something you've developed before. Standard registration asking for name, email, password -> send confirmation email. - Once user is logged in, it will take them to the app ([login to view URL]) where they can add and view their notes which are saved (stored on my server), so when they login they still have their notes. The app uses Laverna opensource note taking app (see github for documentation: [login to view URL]) It is written in JavaScript. - Make it possible to upload and view a pdf next to the editing area (see video screencast for details). - Make it possible to add notes to a pdf file by selecting a text area in the pdf file and then add a corresponding note. This note can be clicked and goes to the section highlighted in the pdf. (Similar functionality to the Chrome extension called Hypothesis). The notes are obviously saved so when the user returns to the app and clicks a note, they can see all the comments they made and the pdf which they uploaded previously. That is all. Thanks in advance!