added gem requirement for sdague's fork of the icalendar gem
added gem requirement for sdague's fork of the icalendar gem

mynameisfashanu/openconferenceware,mynameisfashanu/openconferenceware,osbridge/openconferenceware,osbridge/openconferenceware,osbridge/openconferenceware,ondrocks/openconferenceware,osbridge/openconferenceware,ondrocks/openconferenceware,mynameisfashanu/openconferenceware,mynameisfashanu/openconferenceware,ondrocks/openconferenceware,ondrocks/openconferenceware