WIP. Support two / multiple authors.
Program data: Replace :speakers with 'speakers'.
Add missing type and time information
1. Add space between speaker names
2. Add Ranjeet Singh's Twitter handle
Add title and description to Paolo's talk
Split up sanakhan_libre & AkankshaHA
Open twitter links in a new window/tab
Add some margin in case of multiple speakers
Add lineheight for talk headings
Merge pull request #35 from GardenCityRuby/support-two-authors

Support two authors