Quick styling of login form

[DanielJackson-Oslo]

Styles the devise views and login forms to be more consistent with latest changes, and ready for making the front page.

• [x] Removes logo, as it's in the menu now for all pages

• [x] Makes google login visually the default choice, and email login the fallback

• [x] Left aligns non-login forms, so they are the same as the rest of the page:

• [x] Changes wording to "My user" instead of "Your user"
• [x] Moves "back button" to the top

[DanielJackson-Oslo]

Cannot see the * inside the password fields

Funky! Will fix. Not sure if that was there in main already or not, as I haven't changed that part of the code.

[DanielJackson-Oslo]

@mathias234 Fixed now!