Merge pull request #5 from alexthomazo/gh-pages

Éviter aux avatars des speakers d'être déformés
Better colors
Text-align : left for modal
Fix #7 : Big updates in speakers page
Also fix #6 : links are visible now.
Add first version of 'programme' page
Automatic calcul of start and end time of day, and add of keynote format
Fix lab time and add colors
Add talk detail in modal
Add speakers detail
cfp is closed
Change colors
Hand cursor on talks in programme page