Ability to add logo to Organization Profile

[wesrowe]

Current state: when a Follower clicks a link in a branded email/social post from the Org, they land on a page branded "helloGOV." This could create real trust issues.

Future state:

• Create an "Add Logo" button to Organization Sign Up Form (Issue #193 )
• Create an "Add Logo" section to the Account management screen
• Open "Select File" dialog (browser default functionality)
• Upload file to Mongo
• Add image to all pages of the Follower app for any campaign created by this account

Note: Each org should have branding assets (e.g. logo) necessary for Facebook pages. The bare minimum for FB seems to be a square format, which FB displays in a circular frame.

[kate-rose]

Modifying this ask as the logo and organization name will now be added in a signup workflow and be available for all of an account's campaigns. We still need several items added to the landing page that results when a follower clicks the shortlink.

See details here: https://github.com/helloGov/webapp/issues/193

Future state:

• Make the b.g. color of all Follower pages white
• Add logo image to all campaign landing pages of the Follower app
• Add organization name to all campaign landing pages of the Follower app