Venue.java does not contain social field

[ligi]

as in http://developer.ticketmaster.com/products-and-docs/apis/discovery-api/v2/

social (object) - Social networks data
twitter (object) - Twitter data
handle (string) - Twitter handle
hashtags (array) - Twitter hashtags

[ledor473]

This should help: #14

Seems like I forgot to add the hashtags field.

Feel free to send a Pull Request for it