A few changes....
Merge branch 'master' of github.com:delsener/ch.zhaw.mdp.fallstudie

Conflicts:
	implementation/jmail/src/main/java/ch/zhaw/mdp/fallstudie/jmail/core/account/Account.java
	implementation/jmail/src/test/java/ch/zhaw/mdp/fallstudie/jmail/controller/MessageSenderTest.java
Code formatting