Improved CacheLookupsMixin#lookup, it returns empty array when no values have been set.
Improved CacheLookupsMixin#lookup, it returns empty array when no values
have been set.

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