Guide saving from new guide form.
Fixed adding section thing.
Fixed issue where email searching wouldn't match literal underscore characters.
Set up validations for guide and section, and handler on new guide view to handle errors.
New guide form validation, with error messages in tooltips.
Improved error messages.
Added /api/users/exists/:email route.
Bug fixes for new guide form validation, checking if user is valid via api call.
Added visual indicator of email validity.