How to get it working:
 - [X] Landsbankinn API client for arbitrary transaction lists
 - [ ] Transform raw transactions into friendlier ones (i.e. date objects)
 - [ ] Content script that can run all the time and puts a button somewhere (statements tab, and extension icon)
 - [ ] Background page that downloads all the shit and combines into CSV, then 'downloads' file.
 - [ ] Graphql API client to get information about user, like listing accounts.
   - [ ] Get working client
   - [ ] Set API key
   - [ ] Set bearer token
   - [ ] Intercept bearer token by yoinking it out of a request