New Landing Page and Adjusted User Flow (#51)
* Rework userflow for DOI UI
- Remove navigation buttons for Release and Reserve
- Add navigation buttons for Home, Search, and FAQ
- Add new page for Home
- Add new page for FAQ
- Add new page for Create DOI
- Display error/warning messages on page from which raised
Addresses #44
Addresses #34
Possibly addresses #41
Possibly addresses #42
* Correct button text and API calls
- Revert to appropriate actions, i.e. 'draft' and 'reserve' only
- Edit button text to say 'Submit for Review' instead of 'Release
Additional changes:
- Display DOI of newly reserved item in success message
- Add margin to bottom of page
Resolves #47
Continues #44
