Call skip codes and recurring meeting handling

The following changes were made:

• CALLS table: The SKIP_REASON field was added. For details on the skip reasons, see Skip codes for unrecorded calls.
• CONVERSATION_TRACKERS table: Data about deleted keyword trackers is now reflected.
• MEETINGS table: A new record is now added for each meeting that occurs as part of a series of recurring meetings.
• USER_CONVERSATION_GONG_ACTIVITIES table: The recieved_scorecard value in the GONG_ACTIVITY_TYPE field has been removed.