move to gigpress
build up json-ld of event, place, postal address for shows and print it in the show list footer
move json-ld creation to a function
fix function name
add offer
add all extra fields from gig press
comments added for the json-ld markup creation
updated code format to match existing code
remove schema.org prefix
move back to trunk
Merge pull request #7 from alexkunger/jsonld

Add support for JSON-LD structured markup for GigPress events
Remove hCalendar markup; modify Schema generation; add Schema setting

* Added schema.org/Event structured data markup to support indexing of events by search engines (formatted with the new JSON-LD standard)
* Removed hCalendar markup elements from default templates
Added support for outputting schema.org/Event structured data under PHP < 5.4
* Now enabling JSON-LD output by default when upgrading
* Removed some extraneous markup from default templates
* Fixed PHP error related to custom menu order when inside Network Dashboard