Serialiseren + kleine aanpassingen

Automatisch achtergrond getoond na 1e keer opstarten + label met "Geen
kaarten in Collection"
Merge branch 'master' of https://github.com/BusinesscardExchager/Eric-Maikel

Conflicts:
	CardApp/bin/classes.dex
	CardApp/bin/classes/com/example/businesscardexchager/Card$1.class
	CardApp/bin/classes/com/example/businesscardexchager/Card.class
	CardApp/bin/classes/com/example/businesscardexchager/FragmentA.class
	CardApp/bin/resources.ap_
	CardApp/src/com/example/businesscardexchager/Card.java