Merged two versions of the issuedBy property, adopting the existing appropriate text which
integrates Ticket and Permit usage.

Thanks to Simon Spero in http://lists.w3.org/Archives/Public/public-vocabs/2014May/0193.html for reporting this.
Converted two definitions of http://schema.org/priceCurrency using the
more general language (i.e. the wording which better supports non-Offer objects
having a priceCurrency).

Thanks again to Simon Spero, via http://lists.w3.org/Archives/Public/public-vocabs/2014May/0193.html
Converging definitions for startTime and endTime. Cleaning up mis-configured
departTime property.

Fixing ambiguously mis-defined "departTime" property. It was mis-ID'd "startTime" and so
proposed "departTime" property never existed. Given that we already have "departureTime" (transport-related),
and that 'startTime' already has the issue of applying both to FoodEstablishmentReservation
and to Action, the "departTime" notion should be handled by endTime.

Also added note about the relationship to Event's startDate/endDate properties.

Reported: http://lists.w3.org/Archives/Public/public-vocabs/2014May/0193.html