add space to spacer twitter text for better formatting
improve sponsor options table formatting when seen from a mobile device
fix netcentric url format
add supporters to navbar
fix sponsor link to sponsor.html format and add the same link after supporters page
make sponsors list more maintainable (easy to be expanded)
improve soponsor/supporter image foprmatting
improve soponsors.html link formating
try to improve the sponsor options style a little bit
fix bug in workshops when no speaker
convert agenda.workshop into agenda.alttrack so it is easy to understand that you can define and alternative track talk/workshop