Contack vCard

Contack is a simple library for managing contacts in rust. Contack-vCard allows simple exporting to the vcard format. Here is an example

fn main() {
	// Creates a Contact
	let mut contact = contack::Contact::new (
   		contack::name::Name {
   			given : 		Some("John"),
   			additional : 	None,
   			family :		Some("Toohey"),
   			prefixes : 		None,
   			suffixes :		None,
   		}
	);
	// Sets the email
	contact.contact_information.push (
   		contack::contact_information::ContactInformation::new (
   			"john_t@mailo.com",
   			Email
   		)
	);
	// Turns it to a vCard
	let vcontact = contack_vcard::contack_to_vcard (
   		contact
	);
	// Prints it out
	println!("{}", vcontact);
   }
   ```