CiviEvent APIs - Reimplement as Version2 APIs and Add Event Search API

Reimplement the following existing Event and Participant APIs as V2 APIs:

Event
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event_create
event_update
event_delete

Create a new API for event_search. Searches by any combination of

• start_date range (start_date FROM and TO)
• event type
• event title
• event ID
• is_public
  Returns event and event_page properties as well as COUNT of registered participants (status = Registered).

Participant
========
_create (participant and participant_payment)
_update (participant and participant_payment)
_ delete (participant and participant_payment)

New API participant_search replaces get_participant. Searches by any combination of:

• contact ID
• participant ID
• event start_date range (start_date FROM and TO)
• event type
• event title
• event ID

Returns event ID and participant Info (including status).