rubyday13 website draft
- backend - talks - index: change slot and speaker ids with the object title value
- backend - all - index: remove created and updated timestamps
- backend: add sponsor page
- backend - slot - edit: improve schedule input type with some datetime magic
- backend - talks - new: you can insert only talks... keynotes are speakerless... must modified in case of need
- frontend - index: change colorscheme to white
- frontend - layout: add links to schedule, venue, sponsor, register and speakers