Add support for new event types in NWB v2.10

[oruebel]

NWB adds new types for recording event-based data. Users have requested support for these new types in AqNWB to support recording of behavioral events.

For details on schema changes see

• Added MeaningsTable data type and group to hold them in DynamicTable hdmf-dev/hdmf-common-schema#91
• Implement NWBEP001 (add EventsTable and more) nwb-schema#645