Improved TimeRangeHelper, added caching.
Improved TimeRangeHelper, added caching.

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